parseUnit(Order)
  skipErrorTokens(Order)
  listener: beginCompilationUnit(Order)
  syntheticPreviousToken(Order)
  parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
    parseMetadataStar()
      listener: beginMetadataStar(Order)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl()
      listener: beginTopLevelMember(Order)
      parseTopLevelMethod(, null, null, , Instance of 'SimpleType', null, method1, false)
        listener: beginTopLevelMethod(, null, null)
        listener: handleIdentifier(Order, typeReference)
        listener: handleNoTypeArguments(method1)
        listener: handleType(Order, null)
        ensureIdentifierPotentiallyRecovered(Order, topLevelFunctionDeclaration, false)
          listener: handleIdentifier(method1, topLevelFunctionDeclaration)
        parseMethodTypeVar(method1)
          listener: handleNoTypeVariables(()
        parseGetterOrFormalParameters(method1, method1, false, MemberKind.TopLevelMethod)
          parseFormalParameters(method1, MemberKind.TopLevelMethod)
            parseFormalParametersRest((, MemberKind.TopLevelMethod)
              listener: beginFormalParameters((, MemberKind.TopLevelMethod)
              parseFormalParameter((, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
                parseMetadataStar(()
                  listener: beginMetadataStar(Map)
                  listener: endMetadataStar(0)
                listener: beginFormalParameter(Map, MemberKind.TopLevelMethod, null, null, null)
                ensureIdentifier((, typeReference)
                  listener: handleIdentifier(Map, typeReference)
                listener: beginTypeArguments(<)
                listener: handleIdentifier(String, typeReference)
                listener: handleNoTypeArguments(,)
                listener: handleType(String, null)
                listener: handleIdentifier(dynamic, typeReference)
                listener: handleNoTypeArguments(>)
                listener: handleType(dynamic, null)
                listener: endTypeArguments(2, <, >)
                listener: handleType(Map, null)
                ensureIdentifier(>, formalParameterDeclaration)
                  listener: handleIdentifier(json, formalParameterDeclaration)
                listener: handleFormalParameterWithoutValue())
                listener: endFormalParameter(null, null, null, json, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
              listener: endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
        parseAsyncModifierOpt())
          listener: handleAsyncModifier(null, null)
          inPlainSync()
        parseFunctionBody(), false, false)
          listener: beginBlockFunctionBody({)
          notEofOrValue(}, return)
          parseStatement({)
            parseStatementX({)
              parseReturnStatement({)
                listener: beginReturnStatement(return)
                parseExpression(return)
                  parsePrecedenceExpression(return, 1, true)
                    parseUnaryExpression(return, true)
                      parsePrimary(return, expression)
                        parseSendOrFunctionLiteral(return, expression)
                          looksLikeFunctionBody(..)
                          parseSend(return, expression)
                            isNextIdentifier(return)
                            ensureIdentifier(return, expression)
                              listener: handleIdentifier(Order, expression)
                            listener: handleNoTypeArguments(()
                            parseArgumentsOpt(Order)
                              parseArguments(Order)
                                parseArgumentsRest(()
                                  listener: beginArguments(()
                                  listener: endArguments(0, (, ))
                            listener: handleSend(Order, ..)
                    parseCascadeExpression())
                      listener: beginCascade(..)
                      parseSend(.., expressionContinuation)
                        isNextIdentifier(..)
                        ensureIdentifier(.., expressionContinuation)
                          listener: handleIdentifier(x, expressionContinuation)
                        listener: handleNoTypeArguments(=)
                        parseArgumentsOpt(x)
                          listener: handleNoArguments(=)
                        listener: handleSend(x, =)
                      listener: handleEndingBinaryExpression(..)
                      parseArgumentOrIndexStar(x, Instance of 'NoTypeParamOrArg', false)
                      parseExpressionWithoutCascade(=)
                        parsePrecedenceExpression(=, 1, false)
                          parseUnaryExpression(=, false)
                            parsePrimary(=, expression)
                              parseSendOrFunctionLiteral(=, expression)
                                parseSend(=, expression)
                                  isNextIdentifier(=)
                                  ensureIdentifier(=, expression)
                                    listener: handleIdentifier(json, expression)
                                  listener: handleNoTypeArguments([)
                                  parseArgumentsOpt(json)
                                    listener: handleNoArguments([)
                                  listener: handleSend(json, [)
                          parseArgumentOrIndexStar(json, Instance of 'NoTypeParamOrArg', false)
                            parseExpression([)
                              parsePrecedenceExpression([, 1, true)
                                parseUnaryExpression([, true)
                                  parsePrimary([, expression)
                                    parseLiteralString([)
                                      parseSingleLiteralString([)
                                        listener: beginLiteralString('x')
                                        listener: endLiteralString(0, ])
                            listener: handleIndexedExpression(null, [, ])
                          parseAsOperatorRest(])
                            listener: beginAsOperatorType(as)
                            computeTypeAfterIsOrAs(as)
                            listener: handleIdentifier(List, typeReference)
                            listener: handleNoTypeArguments(..)
                            listener: handleType(List, null)
                            listener: endAsOperatorType(as)
                            listener: handleAsOperator(as)
                            skipChainedAsIsOperators(List)
                      listener: handleAssignmentExpression(=)
                      listener: endCascade()
                    parseCascadeExpression(List)
                      listener: beginCascade(..)
                      parseSend(.., expressionContinuation)
                        isNextIdentifier(..)
                        ensureIdentifier(.., expressionContinuation)
                          listener: handleIdentifier(y, expressionContinuation)
                        listener: handleNoTypeArguments(=)
                        parseArgumentsOpt(y)
                          listener: handleNoArguments(=)
                        listener: handleSend(y, =)
                      listener: handleEndingBinaryExpression(..)
                      parseArgumentOrIndexStar(y, Instance of 'NoTypeParamOrArg', false)
                      parseExpressionWithoutCascade(=)
                        parsePrecedenceExpression(=, 1, false)
                          parseUnaryExpression(=, false)
                            parsePrimary(=, expression)
                              parseSendOrFunctionLiteral(=, expression)
                                parseSend(=, expression)
                                  isNextIdentifier(=)
                                  ensureIdentifier(=, expression)
                                    listener: handleIdentifier(json, expression)
                                  listener: handleNoTypeArguments([)
                                  parseArgumentsOpt(json)
                                    listener: handleNoArguments([)
                                  listener: handleSend(json, [)
                          parseArgumentOrIndexStar(json, Instance of 'NoTypeParamOrArg', false)
                            parseExpression([)
                              parsePrecedenceExpression([, 1, true)
                                parseUnaryExpression([, true)
                                  parsePrimary([, expression)
                                    parseLiteralString([)
                                      parseSingleLiteralString([)
                                        listener: beginLiteralString('y')
                                        listener: endLiteralString(0, ])
                            listener: handleIndexedExpression(null, [, ])
                          parseAsOperatorRest(])
                            listener: beginAsOperatorType(as)
                            computeTypeAfterIsOrAs(as)
                            listener: handleIdentifier(int, typeReference)
                            listener: handleNoTypeArguments(;)
                            listener: handleType(int, null)
                            listener: endAsOperatorType(as)
                            listener: handleAsOperator(as)
                            skipChainedAsIsOperators(int)
                      listener: handleAssignmentExpression(=)
                      listener: endCascade()
                ensureSemicolon(int)
                listener: endReturnStatement(true, return, ;)
                inGenerator()
          notEofOrValue(}, })
          listener: endBlockFunctionBody(1, {, })
        listener: endTopLevelMethod(Order, null, })
  listener: endTopLevelDeclaration(Order)
  parseTopLevelDeclarationImpl(}, Instance of 'DirectiveContext')
    parseMetadataStar(})
      listener: beginMetadataStar(Order)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl(})
      listener: beginTopLevelMember(Order)
      parseTopLevelMethod(}, null, null, }, Instance of 'SimpleType', null, method2, false)
        listener: beginTopLevelMethod(}, null, null)
        listener: handleIdentifier(Order, typeReference)
        listener: handleNoTypeArguments(method2)
        listener: handleType(Order, null)
        ensureIdentifierPotentiallyRecovered(Order, topLevelFunctionDeclaration, false)
          listener: handleIdentifier(method2, topLevelFunctionDeclaration)
        parseMethodTypeVar(method2)
          listener: handleNoTypeVariables(()
        parseGetterOrFormalParameters(method2, method2, false, MemberKind.TopLevelMethod)
          parseFormalParameters(method2, MemberKind.TopLevelMethod)
            parseFormalParametersRest((, MemberKind.TopLevelMethod)
              listener: beginFormalParameters((, MemberKind.TopLevelMethod)
              parseFormalParameter((, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
                parseMetadataStar(()
                  listener: beginMetadataStar(Map)
                  listener: endMetadataStar(0)
                listener: beginFormalParameter(Map, MemberKind.TopLevelMethod, null, null, null)
                ensureIdentifier((, typeReference)
                  listener: handleIdentifier(Map, typeReference)
                listener: beginTypeArguments(<)
                listener: handleIdentifier(String, typeReference)
                listener: handleNoTypeArguments(,)
                listener: handleType(String, null)
                listener: handleIdentifier(dynamic, typeReference)
                listener: handleNoTypeArguments(>)
                listener: handleType(dynamic, null)
                listener: endTypeArguments(2, <, >)
                listener: handleType(Map, null)
                ensureIdentifier(>, formalParameterDeclaration)
                  listener: handleIdentifier(json, formalParameterDeclaration)
                listener: handleFormalParameterWithoutValue())
                listener: endFormalParameter(null, null, null, json, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
              listener: endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
        parseAsyncModifierOpt())
          listener: handleAsyncModifier(null, null)
          inPlainSync()
        parseFunctionBody(), false, false)
          listener: beginBlockFunctionBody({)
          notEofOrValue(}, return)
          parseStatement({)
            parseStatementX({)
              parseReturnStatement({)
                listener: beginReturnStatement(return)
                parseExpression(return)
                  parsePrecedenceExpression(return, 1, true)
                    parseUnaryExpression(return, true)
                      parsePrimary(return, expression)
                        parseSendOrFunctionLiteral(return, expression)
                          looksLikeFunctionBody(..)
                          parseSend(return, expression)
                            isNextIdentifier(return)
                            ensureIdentifier(return, expression)
                              listener: handleIdentifier(Order, expression)
                            listener: handleNoTypeArguments(()
                            parseArgumentsOpt(Order)
                              parseArguments(Order)
                                parseArgumentsRest(()
                                  listener: beginArguments(()
                                  listener: endArguments(0, (, ))
                            listener: handleSend(Order, ..)
                    parseCascadeExpression())
                      listener: beginCascade(..)
                      parseSend(.., expressionContinuation)
                        isNextIdentifier(..)
                        ensureIdentifier(.., expressionContinuation)
                          listener: handleIdentifier(x, expressionContinuation)
                        listener: handleNoTypeArguments(=)
                        parseArgumentsOpt(x)
                          listener: handleNoArguments(=)
                        listener: handleSend(x, =)
                      listener: handleEndingBinaryExpression(..)
                      parseArgumentOrIndexStar(x, Instance of 'NoTypeParamOrArg', false)
                      parseExpressionWithoutCascade(=)
                        parsePrecedenceExpression(=, 1, false)
                          parseUnaryExpression(=, false)
                            parsePrimary(=, expression)
                              parseSendOrFunctionLiteral(=, expression)
                                parseSend(=, expression)
                                  isNextIdentifier(=)
                                  ensureIdentifier(=, expression)
                                    listener: handleIdentifier(json, expression)
                                  listener: handleNoTypeArguments([)
                                  parseArgumentsOpt(json)
                                    listener: handleNoArguments([)
                                  listener: handleSend(json, [)
                          parseArgumentOrIndexStar(json, Instance of 'NoTypeParamOrArg', false)
                            parseExpression([)
                              parsePrecedenceExpression([, 1, true)
                                parseUnaryExpression([, true)
                                  parsePrimary([, expression)
                                    parseLiteralString([)
                                      parseSingleLiteralString([)
                                        listener: beginLiteralString('x')
                                        listener: endLiteralString(0, ])
                            listener: handleIndexedExpression(null, [, ])
                          parseAsOperatorRest(])
                            listener: beginAsOperatorType(as)
                            computeTypeAfterIsOrAs(as)
                            listener: handleIdentifier(List, typeReference)
                            listener: handleNoTypeArguments(?)
                            listener: handleType(List, ?)
                            listener: endAsOperatorType(as)
                            listener: handleAsOperator(as)
                            skipChainedAsIsOperators(?)
                      listener: handleAssignmentExpression(=)
                      listener: endCascade()
                    parseCascadeExpression(?)
                      listener: beginCascade(..)
                      parseSend(.., expressionContinuation)
                        isNextIdentifier(..)
                        ensureIdentifier(.., expressionContinuation)
                          listener: handleIdentifier(y, expressionContinuation)
                        listener: handleNoTypeArguments(=)
                        parseArgumentsOpt(y)
                          listener: handleNoArguments(=)
                        listener: handleSend(y, =)
                      listener: handleEndingBinaryExpression(..)
                      parseArgumentOrIndexStar(y, Instance of 'NoTypeParamOrArg', false)
                      parseExpressionWithoutCascade(=)
                        parsePrecedenceExpression(=, 1, false)
                          parseUnaryExpression(=, false)
                            parsePrimary(=, expression)
                              parseSendOrFunctionLiteral(=, expression)
                                parseSend(=, expression)
                                  isNextIdentifier(=)
                                  ensureIdentifier(=, expression)
                                    listener: handleIdentifier(json, expression)
                                  listener: handleNoTypeArguments([)
                                  parseArgumentsOpt(json)
                                    listener: handleNoArguments([)
                                  listener: handleSend(json, [)
                          parseArgumentOrIndexStar(json, Instance of 'NoTypeParamOrArg', false)
                            parseExpression([)
                              parsePrecedenceExpression([, 1, true)
                                parseUnaryExpression([, true)
                                  parsePrimary([, expression)
                                    parseLiteralString([)
                                      parseSingleLiteralString([)
                                        listener: beginLiteralString('y')
                                        listener: endLiteralString(0, ])
                            listener: handleIndexedExpression(null, [, ])
                          parseAsOperatorRest(])
                            listener: beginAsOperatorType(as)
                            computeTypeAfterIsOrAs(as)
                            listener: handleIdentifier(int, typeReference)
                            listener: handleNoTypeArguments(;)
                            listener: handleType(int, null)
                            listener: endAsOperatorType(as)
                            listener: handleAsOperator(as)
                            skipChainedAsIsOperators(int)
                      listener: handleAssignmentExpression(=)
                      listener: endCascade()
                ensureSemicolon(int)
                listener: endReturnStatement(true, return, ;)
                inGenerator()
          notEofOrValue(}, })
          listener: endBlockFunctionBody(1, {, })
        listener: endTopLevelMethod(Order, null, })
  listener: endTopLevelDeclaration(Order)
  parseTopLevelDeclarationImpl(}, Instance of 'DirectiveContext')
    parseMetadataStar(})
      listener: beginMetadataStar(Order)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl(})
      listener: beginTopLevelMember(Order)
      parseTopLevelMethod(}, null, null, }, Instance of 'SimpleType', null, method3, false)
        listener: beginTopLevelMethod(}, null, null)
        listener: handleIdentifier(Order, typeReference)
        listener: handleNoTypeArguments(method3)
        listener: handleType(Order, null)
        ensureIdentifierPotentiallyRecovered(Order, topLevelFunctionDeclaration, false)
          listener: handleIdentifier(method3, topLevelFunctionDeclaration)
        parseMethodTypeVar(method3)
          listener: handleNoTypeVariables(()
        parseGetterOrFormalParameters(method3, method3, false, MemberKind.TopLevelMethod)
          parseFormalParameters(method3, MemberKind.TopLevelMethod)
            parseFormalParametersRest((, MemberKind.TopLevelMethod)
              listener: beginFormalParameters((, MemberKind.TopLevelMethod)
              parseFormalParameter((, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
                parseMetadataStar(()
                  listener: beginMetadataStar(Map)
                  listener: endMetadataStar(0)
                listener: beginFormalParameter(Map, MemberKind.TopLevelMethod, null, null, null)
                ensureIdentifier((, typeReference)
                  listener: handleIdentifier(Map, typeReference)
                listener: beginTypeArguments(<)
                listener: handleIdentifier(String, typeReference)
                listener: handleNoTypeArguments(,)
                listener: handleType(String, null)
                listener: handleIdentifier(dynamic, typeReference)
                listener: handleNoTypeArguments(>)
                listener: handleType(dynamic, null)
                listener: endTypeArguments(2, <, >)
                listener: handleType(Map, null)
                ensureIdentifier(>, formalParameterDeclaration)
                  listener: handleIdentifier(json, formalParameterDeclaration)
                listener: handleFormalParameterWithoutValue())
                listener: endFormalParameter(null, null, null, json, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
              listener: endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
        parseAsyncModifierOpt())
          listener: handleAsyncModifier(null, null)
          inPlainSync()
        parseFunctionBody(), false, false)
          listener: beginBlockFunctionBody({)
          notEofOrValue(}, return)
          parseStatement({)
            parseStatementX({)
              parseReturnStatement({)
                listener: beginReturnStatement(return)
                parseExpression(return)
                  parsePrecedenceExpression(return, 1, true)
                    parseUnaryExpression(return, true)
                      parsePrimary(return, expression)
                        parseSendOrFunctionLiteral(return, expression)
                          looksLikeFunctionBody(..)
                          parseSend(return, expression)
                            isNextIdentifier(return)
                            ensureIdentifier(return, expression)
                              listener: handleIdentifier(Order, expression)
                            listener: handleNoTypeArguments(()
                            parseArgumentsOpt(Order)
                              parseArguments(Order)
                                parseArgumentsRest(()
                                  listener: beginArguments(()
                                  listener: endArguments(0, (, ))
                            listener: handleSend(Order, ..)
                    parseCascadeExpression())
                      listener: beginCascade(..)
                      parseSend(.., expressionContinuation)
                        isNextIdentifier(..)
                        ensureIdentifier(.., expressionContinuation)
                          listener: handleIdentifier(x, expressionContinuation)
                        listener: handleNoTypeArguments(=)
                        parseArgumentsOpt(x)
                          listener: handleNoArguments(=)
                        listener: handleSend(x, =)
                      listener: handleEndingBinaryExpression(..)
                      parseArgumentOrIndexStar(x, Instance of 'NoTypeParamOrArg', false)
                      parseExpressionWithoutCascade(=)
                        parsePrecedenceExpression(=, 1, false)
                          parseUnaryExpression(=, false)
                            parsePrimary(=, expression)
                              parseParenthesizedExpressionFunctionLiteralOrRecordLiteral(=)
                                parseParenthesizedExpressionOrRecordLiteral(=)
                                  listener: beginParenthesizedExpressionOrRecordLiteral(()
                                  parseExpression(()
                                    parsePrecedenceExpression((, 1, true)
                                      parseUnaryExpression((, true)
                                        parsePrimary((, expression)
                                          parseSendOrFunctionLiteral((, expression)
                                            parseSend((, expression)
                                              isNextIdentifier(()
                                              ensureIdentifier((, expression)
                                                listener: handleIdentifier(json, expression)
                                              listener: handleNoTypeArguments([)
                                              parseArgumentsOpt(json)
                                                listener: handleNoArguments([)
                                              listener: handleSend(json, [)
                                      parseArgumentOrIndexStar(json, Instance of 'NoTypeParamOrArg', false)
                                        parseExpression([)
                                          parsePrecedenceExpression([, 1, true)
                                            parseUnaryExpression([, true)
                                              parsePrimary([, expression)
                                                parseLiteralString([)
                                                  parseSingleLiteralString([)
                                                    listener: beginLiteralString('x')
                                                    listener: endLiteralString(0, ])
                                        listener: handleIndexedExpression(null, [, ])
                                      parseAsOperatorRest(])
                                        listener: beginAsOperatorType(as)
                                        computeTypeAfterIsOrAs(as)
                                        listener: handleIdentifier(List, typeReference)
                                        listener: handleNoTypeArguments(?)
                                        listener: handleType(List, ?)
                                        listener: endAsOperatorType(as)
                                        listener: handleAsOperator(as)
                                        skipChainedAsIsOperators(?)
                                  ensureCloseParen(?, ()
                                  listener: endParenthesizedExpression(()
                      listener: handleAssignmentExpression(=)
                      listener: endCascade()
                    parseCascadeExpression())
                      listener: beginCascade(..)
                      parseSend(.., expressionContinuation)
                        isNextIdentifier(..)
                        ensureIdentifier(.., expressionContinuation)
                          listener: handleIdentifier(y, expressionContinuation)
                        listener: handleNoTypeArguments(=)
                        parseArgumentsOpt(y)
                          listener: handleNoArguments(=)
                        listener: handleSend(y, =)
                      listener: handleEndingBinaryExpression(..)
                      parseArgumentOrIndexStar(y, Instance of 'NoTypeParamOrArg', false)
                      parseExpressionWithoutCascade(=)
                        parsePrecedenceExpression(=, 1, false)
                          parseUnaryExpression(=, false)
                            parsePrimary(=, expression)
                              parseSendOrFunctionLiteral(=, expression)
                                parseSend(=, expression)
                                  isNextIdentifier(=)
                                  ensureIdentifier(=, expression)
                                    listener: handleIdentifier(json, expression)
                                  listener: handleNoTypeArguments([)
                                  parseArgumentsOpt(json)
                                    listener: handleNoArguments([)
                                  listener: handleSend(json, [)
                          parseArgumentOrIndexStar(json, Instance of 'NoTypeParamOrArg', false)
                            parseExpression([)
                              parsePrecedenceExpression([, 1, true)
                                parseUnaryExpression([, true)
                                  parsePrimary([, expression)
                                    parseLiteralString([)
                                      parseSingleLiteralString([)
                                        listener: beginLiteralString('y')
                                        listener: endLiteralString(0, ])
                            listener: handleIndexedExpression(null, [, ])
                          parseAsOperatorRest(])
                            listener: beginAsOperatorType(as)
                            computeTypeAfterIsOrAs(as)
                            listener: handleIdentifier(int, typeReference)
                            listener: handleNoTypeArguments(;)
                            listener: handleType(int, null)
                            listener: endAsOperatorType(as)
                            listener: handleAsOperator(as)
                            skipChainedAsIsOperators(int)
                      listener: handleAssignmentExpression(=)
                      listener: endCascade()
                ensureSemicolon(int)
                listener: endReturnStatement(true, return, ;)
                inGenerator()
          notEofOrValue(}, })
          listener: endBlockFunctionBody(1, {, })
        listener: endTopLevelMethod(Order, null, })
  listener: endTopLevelDeclaration(Order)
  parseTopLevelDeclarationImpl(}, Instance of 'DirectiveContext')
    parseMetadataStar(})
      listener: beginMetadataStar(Order)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl(})
      listener: beginTopLevelMember(Order)
      parseTopLevelMethod(}, null, null, }, Instance of 'SimpleType', null, method4, false)
        listener: beginTopLevelMethod(}, null, null)
        listener: handleIdentifier(Order, typeReference)
        listener: handleNoTypeArguments(method4)
        listener: handleType(Order, null)
        ensureIdentifierPotentiallyRecovered(Order, topLevelFunctionDeclaration, false)
          listener: handleIdentifier(method4, topLevelFunctionDeclaration)
        parseMethodTypeVar(method4)
          listener: handleNoTypeVariables(()
        parseGetterOrFormalParameters(method4, method4, false, MemberKind.TopLevelMethod)
          parseFormalParameters(method4, MemberKind.TopLevelMethod)
            parseFormalParametersRest((, MemberKind.TopLevelMethod)
              listener: beginFormalParameters((, MemberKind.TopLevelMethod)
              parseFormalParameter((, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
                parseMetadataStar(()
                  listener: beginMetadataStar(Map)
                  listener: endMetadataStar(0)
                listener: beginFormalParameter(Map, MemberKind.TopLevelMethod, null, null, null)
                ensureIdentifier((, typeReference)
                  listener: handleIdentifier(Map, typeReference)
                listener: beginTypeArguments(<)
                listener: handleIdentifier(String, typeReference)
                listener: handleNoTypeArguments(,)
                listener: handleType(String, null)
                listener: handleIdentifier(dynamic, typeReference)
                listener: handleNoTypeArguments(>)
                listener: handleType(dynamic, null)
                listener: endTypeArguments(2, <, >)
                listener: handleType(Map, null)
                ensureIdentifier(>, formalParameterDeclaration)
                  listener: handleIdentifier(json, formalParameterDeclaration)
                listener: handleFormalParameterWithoutValue())
                listener: endFormalParameter(null, null, null, json, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
              listener: endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
        parseAsyncModifierOpt())
          listener: handleAsyncModifier(null, null)
          inPlainSync()
        parseFunctionBody(), false, false)
          listener: beginBlockFunctionBody({)
          notEofOrValue(}, return)
          parseStatement({)
            parseStatementX({)
              parseReturnStatement({)
                listener: beginReturnStatement(return)
                parseExpression(return)
                  parsePrecedenceExpression(return, 1, true)
                    parseUnaryExpression(return, true)
                      parsePrimary(return, expression)
                        parseSendOrFunctionLiteral(return, expression)
                          looksLikeFunctionBody(..)
                          parseSend(return, expression)
                            isNextIdentifier(return)
                            ensureIdentifier(return, expression)
                              listener: handleIdentifier(Order, expression)
                            listener: handleNoTypeArguments(()
                            parseArgumentsOpt(Order)
                              parseArguments(Order)
                                parseArgumentsRest(()
                                  listener: beginArguments(()
                                  listener: endArguments(0, (, ))
                            listener: handleSend(Order, ..)
                    parseCascadeExpression())
                      listener: beginCascade(..)
                      parseSend(.., expressionContinuation)
                        isNextIdentifier(..)
                        ensureIdentifier(.., expressionContinuation)
                          listener: handleIdentifier(x, expressionContinuation)
                        listener: handleNoTypeArguments(=)
                        parseArgumentsOpt(x)
                          listener: handleNoArguments(=)
                        listener: handleSend(x, =)
                      listener: handleEndingBinaryExpression(..)
                      parseArgumentOrIndexStar(x, Instance of 'NoTypeParamOrArg', false)
                      parseExpressionWithoutCascade(=)
                        parsePrecedenceExpression(=, 1, false)
                          parseUnaryExpression(=, false)
                            parsePrimary(=, expression)
                              parseSendOrFunctionLiteral(=, expression)
                                parseSend(=, expression)
                                  isNextIdentifier(=)
                                  ensureIdentifier(=, expression)
                                    listener: handleIdentifier(json, expression)
                                  listener: handleNoTypeArguments([)
                                  parseArgumentsOpt(json)
                                    listener: handleNoArguments([)
                                  listener: handleSend(json, [)
                          parseArgumentOrIndexStar(json, Instance of 'NoTypeParamOrArg', false)
                            parseExpression([)
                              parsePrecedenceExpression([, 1, true)
                                parseUnaryExpression([, true)
                                  parsePrimary([, expression)
                                    parseLiteralString([)
                                      parseSingleLiteralString([)
                                        listener: beginLiteralString('x')
                                        listener: endLiteralString(0, ])
                            listener: handleIndexedExpression(null, [, ])
                          parseAsOperatorRest(])
                            listener: beginAsOperatorType(as)
                            computeTypeAfterIsOrAs(as)
                            listener: handleIdentifier(List, typeReference)
                            listener: handleNoTypeArguments(?)
                            listener: handleType(List, ?)
                            listener: endAsOperatorType(as)
                            listener: handleAsOperator(as)
                            skipChainedAsIsOperators(?)
                      listener: handleAssignmentExpression(=)
                      listener: endCascade()
                ensureSemicolon(?)
                listener: endReturnStatement(true, return, ;)
                inGenerator()
          notEofOrValue(}, })
          listener: endBlockFunctionBody(1, {, })
        listener: endTopLevelMethod(Order, null, })
  listener: endTopLevelDeclaration(class)
  parseTopLevelDeclarationImpl(}, Instance of 'DirectiveContext')
    parseMetadataStar(})
      listener: beginMetadataStar(class)
      listener: endMetadataStar(0)
    parseTopLevelKeywordDeclaration(}, class, null, Instance of 'DirectiveContext')
      parseClassOrNamedMixinApplication(null, null, null, class)
        listener: beginClassOrMixinOrNamedMixinApplicationPrelude(class)
        ensureIdentifier(class, classOrMixinDeclaration)
          listener: handleIdentifier(Order, classOrMixinDeclaration)
        listener: handleNoTypeVariables({)
        listener: beginClassDeclaration(class, null, null, null, Order)
        parseClass(Order, class, class, Order)
          parseClassHeaderOpt(Order, class, class)
            parseClassExtendsOpt(Order)
              listener: handleNoType(Order)
              listener: handleClassExtends(null, 1)
            parseClassWithClauseOpt(Order)
              listener: handleClassNoWithClause()
            parseClassOrMixinOrEnumImplementsOpt(Order)
              listener: handleImplements(null, 0)
            listener: handleClassHeader(class, class, null)
          parseClassOrMixinOrExtensionBody(Order, DeclarationKind.Class, Order)
            listener: beginClassOrMixinOrExtensionBody(DeclarationKind.Class, {)
            notEofOrValue(}, List)
            parseClassOrMixinOrExtensionOrEnumMemberImpl({, DeclarationKind.Class, Order)
              parseMetadataStar({)
                listener: beginMetadataStar(List)
                listener: endMetadataStar(0)
              listener: beginMember()
              parseFields({, null, null, null, null, null, null, null, {, Instance of 'SimpleNullableType', x, DeclarationKind.Class, Order, false)
                listener: beginFields(DeclarationKind.Class, null, null, null, null, null, null, null, {)
                listener: handleIdentifier(List, typeReference)
                listener: handleNoTypeArguments(?)
                listener: handleType(List, ?)
                ensureIdentifierPotentiallyRecovered(?, fieldDeclaration, false)
                  listener: handleIdentifier(x, fieldDeclaration)
                parseFieldInitializerOpt(x, x, null, null, null, null, null, DeclarationKind.Class, Order)
                  listener: handleNoFieldInitializer(;)
                listener: endClassFields(null, null, null, null, null, null, null, 1, List, ;)
              listener: endMember()
            notEofOrValue(}, int)
            parseClassOrMixinOrExtensionOrEnumMemberImpl(;, DeclarationKind.Class, Order)
              parseMetadataStar(;)
                listener: beginMetadataStar(int)
                listener: endMetadataStar(0)
              listener: beginMember()
              parseFields(;, null, null, null, null, null, null, null, ;, Instance of 'SimpleNullableType', y, DeclarationKind.Class, Order, false)
                listener: beginFields(DeclarationKind.Class, null, null, null, null, null, null, null, ;)
                listener: handleIdentifier(int, typeReference)
                listener: handleNoTypeArguments(?)
                listener: handleType(int, ?)
                ensureIdentifierPotentiallyRecovered(?, fieldDeclaration, false)
                  listener: handleIdentifier(y, fieldDeclaration)
                parseFieldInitializerOpt(y, y, null, null, null, null, null, DeclarationKind.Class, Order)
                  listener: handleNoFieldInitializer(;)
                listener: endClassFields(null, null, null, null, null, null, null, 1, int, ;)
              listener: endMember()
            notEofOrValue(}, })
            listener: endClassOrMixinOrExtensionBody(DeclarationKind.Class, 2, {, })
          listener: endClassDeclaration(class, })
  listener: endTopLevelDeclaration()
  reportAllErrorTokens(Order)
  listener: endCompilationUnit(5, )