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(int)
                  listener: endMetadataStar(0)
                listener: beginFormalParameter(int, MemberKind.TopLevelMethod, null, null, null)
                listener: handleIdentifier(int, typeReference)
                listener: handleNoTypeArguments(x)
                listener: handleType(int, null)
                ensureIdentifier(int, 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(}, g)
          parseStatement({)
            parseStatementX({)
              parseExpressionStatementOrDeclarationAfterModifiers({, {, null, null, null, false)
                looksLikeLocalFunction(g)
                parseExpressionStatement({)
                  parseExpression({)
                    parsePrecedenceExpression({, 1, true)
                      parseUnaryExpression({, true)
                        parsePrimary({, expression)
                          parseSendOrFunctionLiteral({, expression)
                            looksLikeFunctionBody(;)
                            parseSend({, expression)
                              isNextIdentifier({)
                              ensureIdentifier({, expression)
                                listener: handleIdentifier(g, expression)
                              listener: handleNoTypeArguments(()
                              parseArgumentsOpt(g)
                                parseArguments(g)
                                  parseArgumentsRest(()
                                    listener: beginArguments(()
                                    ensureIdentifier((, namedArgumentReference)
                                      listener: handleIdentifier(foo, namedArgumentReference)
                                    parseExpression(:)
                                      parsePrecedenceExpression(:, 1, true)
                                        parseUnaryExpression(:, true)
                                          parsePrimary(:, expression)
                                            parseLiteralInt(:)
                                              listener: handleLiteralInt(1)
                                    listener: handleNamedArgument(:)
                                    ensureIdentifier(,, namedArgumentReference)
                                      listener: handleIdentifier(bbb, namedArgumentReference)
                                    parseExpression(:)
                                      parsePrecedenceExpression(:, 1, true)
                                        parseUnaryExpression(:, true)
                                          parsePrimary(:, expression)
                                            parseLiteralInt(:)
                                              listener: handleLiteralInt(0)
                                    listener: handleNamedArgument(:)
                                    listener: endArguments(2, (, ))
                              listener: handleSend(g, ;)
                  ensureSemicolon())
                  listener: handleExpressionStatement(;)
          notEofOrValue(}, })
          listener: endBlockFunctionBody(1, {, })
        listener: endTopLevelMethod(void, null, })
  listener: endTopLevelDeclaration()
  reportAllErrorTokens(void)
  listener: endCompilationUnit(1, )