parseUnit(void)
  skipErrorTokens(void)
  listener: beginCompilationUnit(void)
  syntheticPreviousToken(void)
  parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
    parseMetadataStar()
      listener: beginMetadataStar(void)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl()
      listener: beginTopLevelMember(void)
      parseTopLevelMethod(, null, null, , Instance of '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(x)
                  listener: endMetadataStar(0)
                listener: beginFormalParameter(x, MemberKind.TopLevelMethod, null, null, null)
                listener: handleNoType(()
                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(}, async)
          parseStatement({)
            parseStatementX({)
              parseExpressionStatementOrDeclaration({, null)
                parseExpressionStatementOrDeclarationAfterModifiers({, {, null, null, null, null)
                  looksLikeLocalFunction(async)
                  parseExpressionStatement({)
                    parseExpression({)
                      looksLikeOuterPatternEquals({)
                        skipOuterPattern({)
                          skipObjectPatternRest(Future)
                      parsePatternAssignment({)
                        parsePattern({, PatternContext.assignment, precedence: 1)
                          parsePrimaryPattern({, PatternContext.assignment)
                            listener: beginTypeArguments(<)
                            listener: handleIdentifier(int, typeReference)
                            listener: handleNoTypeArguments(>)
                            listener: handleType(int, null)
                            listener: endTypeArguments(1, <, >)
                            parseObjectPatternRest(>, PatternContext.assignment)
                              listener: handleObjectPatternFields(0, (, ))
                            listener: handleObjectPattern(async, ., Future)
                        parseExpression(=)
                          looksLikeOuterPatternEquals(=)
                            skipOuterPattern(=)
                              skipObjectPatternRest(x)
                          parsePrecedenceExpression(=, 1, true, ConstantPatternContext.none)
                            parseUnaryExpression(=, true, ConstantPatternContext.none)
                              parsePrimary(=, expression, ConstantPatternContext.none)
                                parseSendOrFunctionLiteral(=, expression)
                                  parseSend(=, expression)
                                    isNextIdentifier(=)
                                    ensureIdentifier(=, expression)
                                      listener: handleIdentifier(x, expression)
                                    listener: handleNoTypeArguments(;)
                                    parseArgumentsOpt(x)
                                      listener: handleNoArguments(;)
                                    listener: handleSend(x, ;)
                        listener: handlePatternAssignment(=)
                    ensureSemicolon(x)
                    listener: handleExpressionStatement(;)
          notEofOrValue(}, })
          listener: endBlockFunctionBody(1, {, })
        listener: endTopLevelMethod(void, null, })
  listener: endTopLevelDeclaration()
  reportAllErrorTokens(void)
  listener: endCompilationUnit(1, )