parseUnit(void)
  skipErrorTokens(void)
  listener: beginCompilationUnit(void)
  syntheticPreviousToken(void)
  parseTopLevelDeclarationImpl(, DirectiveContext(DirectiveState.Unknown))
    parseMetadataStar()
      listener: beginMetadataStar(void)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl()
      listener: beginTopLevelMember(void)
      parseTopLevelMethod(, null, null, , VoidType(), null, f, false)
        listener: beginTopLevelMethod(, null, null)
        listener: handleVoidKeyword(void)
        ensureIdentifierPotentiallyRecovered(void, topLevelFunctionDeclaration, false)
          listener: handleIdentifier(f, topLevelFunctionDeclaration)
        parseMethodTypeVar(f)
          listener: handleNoTypeVariables(()
        parseGetterOrFormalParameters(f, f, false, MemberKind.TopLevelMethod)
          parseFormalParameters(f, MemberKind.TopLevelMethod)
            parseFormalParametersRest((, MemberKind.TopLevelMethod)
              listener: beginFormalParameters((, MemberKind.TopLevelMethod)
              parseFormalParameter((, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
                parseMetadataStar(()
                  listener: beginMetadataStar(Object)
                  listener: endMetadataStar(0)
                listener: beginFormalParameter(Object, MemberKind.TopLevelMethod, null, null, null)
                listener: handleIdentifier(Object, typeReference)
                listener: handleNoTypeArguments(?)
                listener: handleType(Object, ?)
                ensureIdentifier(?, formalParameterDeclaration)
                  listener: handleIdentifier(x, formalParameterDeclaration)
                listener: handleFormalParameterWithoutValue())
                listener: endFormalParameter(null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
              listener: endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
        parseAsyncModifierOpt())
          listener: handleAsyncModifier(null, null)
          inPlainSync()
        parseFunctionBody(), false, false)
          listener: beginBlockFunctionBody({)
          notEofOrValue(}, switch)
          parseStatement({)
            parseStatementX({)
              parseSwitchStatement({)
                listener: beginSwitchStatement(switch)
                ensureParenthesizedCondition(switch, allowCase: false)
                  parseExpressionInParenthesisRest((, allowCase: false)
                    parseExpression(()
                      looksLikeOuterPatternEquals(()
                        skipOuterPattern(()
                          skipObjectPatternRest(x)
                      parsePrecedenceExpression((, 1, true, ConstantPatternContext.none)
                        parseUnaryExpression((, true, ConstantPatternContext.none)
                          parsePrimary((, expression, ConstantPatternContext.none)
                            parseSendOrFunctionLiteral((, expression, ConstantPatternContext.none)
                              parseSend((, expression, ConstantPatternContext.none)
                                isNextIdentifier(()
                                ensureIdentifier((, expression)
                                  listener: handleIdentifier(x, expression)
                                listener: handleNoTypeArguments())
                                parseArgumentsOpt(x)
                                  listener: handleNoArguments())
                                listener: handleSend(x, ))
                    ensureCloseParen(x, ()
                    listener: handleParenthesizedCondition((, null, null)
                parseSwitchBlock())
                  ensureBlock(), BlockKind(switch statement))
                  listener: beginSwitchBlock({)
                  notEofOrValue(}, case)
                  peekPastLabels(case)
                  listener: beginCaseExpression(case)
                  parsePattern(case, PatternContext.matching, precedence: 1)
                    listener: beginPattern(case)
                    parsePrimaryPattern(case, PatternContext.matching)
                      listener: handleNoTypeArguments({)
                      parseMapPatternSuffix(case, PatternContext.matching)
                        parseExpression({)
                          looksLikeOuterPatternEquals({)
                            skipOuterPattern({)
                          parsePrecedenceExpression({, 1, true, ConstantPatternContext.none)
                            parseUnaryExpression({, true, ConstantPatternContext.none)
                              parsePrimary({, expression, ConstantPatternContext.none)
                                parseLiteralInt({)
                                  listener: handleLiteralInt(0)
                        parsePattern(:, PatternContext.matching, precedence: 1)
                          listener: beginPattern(:)
                          parsePrimaryPattern(:, PatternContext.matching)
                            listener: beginConstantPattern(null)
                            parsePrecedenceExpression(:, 7, false, ConstantPatternContext.implicit)
                              parseUnaryExpression(:, false, ConstantPatternContext.implicit)
                                parsePrimary(:, expression, ConstantPatternContext.implicit)
                                  inPlainSync()
                                  parseSend(:, expression, ConstantPatternContext.implicit)
                                    isNextIdentifier(:)
                                    ensureIdentifier(:, expression)
                                      reportRecoverableErrorWithToken(if, Template(ExpectedIdentifier))
                                        listener: handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
                                      rewriter()
                                      listener: handleIdentifier(, expression)
                                    listener: handleNoTypeArguments(if)
                                    parseArgumentsOpt()
                                      listener: handleNoArguments(if)
                                    listener: handleSend(, if)
                            listener: endConstantPattern(null)
                          listener: endPattern()
                        listener: handleMapPatternEntry(:, if)
                        rewriteAndRecover(, Message[ExpectedButGot, Expected ',' before this., null, {string: ,}], ,)
                          reportRecoverableError(if, Message[ExpectedButGot, Expected ',' before this., null, {string: ,}])
                            listener: handleRecoverableError(Message[ExpectedButGot, Expected ',' before this., null, {string: ,}], if, if)
                          rewriter()
                        parseExpression(,)
                          looksLikeOuterPatternEquals(,)
                            skipOuterPattern(,)
                          parsePrecedenceExpression(,, 1, true, ConstantPatternContext.none)
                            parseUnaryExpression(,, true, ConstantPatternContext.none)
                              parsePrimary(,, expression, ConstantPatternContext.none)
                                inPlainSync()
                                parseSend(,, expression, ConstantPatternContext.none)
                                  isNextIdentifier(,)
                                  ensureIdentifier(,, expression)
                                    reportRecoverableErrorWithToken(if, Template(ExpectedIdentifier))
                                      listener: handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
                                    rewriter()
                                    listener: handleIdentifier(, expression)
                                  listener: handleNoTypeArguments(if)
                                  parseArgumentsOpt()
                                    listener: handleNoArguments(if)
                                  listener: handleSend(, if)
                        rewriteAndRecover(, Message[ExpectedButGot, Expected ':' before this., null, {string: :}], :)
                          reportRecoverableError(if, Message[ExpectedButGot, Expected ':' before this., null, {string: :}])
                            listener: handleRecoverableError(Message[ExpectedButGot, Expected ':' before this., null, {string: :}], if, if)
                          rewriter()
                        parsePattern(:, PatternContext.matching, precedence: 1)
                          listener: beginPattern(:)
                          parsePrimaryPattern(:, PatternContext.matching)
                            listener: beginConstantPattern(null)
                            parsePrecedenceExpression(:, 7, false, ConstantPatternContext.implicit)
                              parseUnaryExpression(:, false, ConstantPatternContext.implicit)
                                parsePrimary(:, expression, ConstantPatternContext.implicit)
                                  inPlainSync()
                                  parseSend(:, expression, ConstantPatternContext.implicit)
                                    isNextIdentifier(:)
                                    ensureIdentifier(:, expression)
                                      reportRecoverableErrorWithToken(if, Template(ExpectedIdentifier))
                                        listener: handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
                                      rewriter()
                                      listener: handleIdentifier(, expression)
                                    listener: handleNoTypeArguments(if)
                                    parseArgumentsOpt()
                                      listener: handleNoArguments(if)
                                    listener: handleSend(, if)
                            listener: endConstantPattern(null)
                          listener: endPattern()
                        listener: handleMapPatternEntry(:, })
                        listener: handleMapPattern(2, {, })
                    listener: endPattern(})
                  listener: handleSwitchCaseNoWhenClause(})
                  ensureColon(})
                  listener: endCaseExpression(case, null, :)
                  peekPastLabels(})
                  parseStatementsInSwitchCase(:, }, case, 0, 1, null, null)
                    listener: beginSwitchCase(0, 1, case)
                    listener: endSwitchCase(0, 1, null, null, 0, case, :)
                  notEofOrValue(}, })
                  listener: endSwitchBlock(1, {, })
                listener: endSwitchStatement(switch, })
          notEofOrValue(}, ;)
          parseStatement(})
            parseStatementX(})
              parseEmptyStatement(})
                listener: handleEmptyStatement(;)
          notEofOrValue(}, })
          listener: endBlockFunctionBody(2, {, })
        listener: endTopLevelMethod(void, null, })
  listener: endTopLevelDeclaration(})
  reportAllErrorTokens(void)
  listener: endCompilationUnit(1, )