parseUnit(library)
  skipErrorTokens(library)
  listener: beginCompilationUnit(library)
  syntheticPreviousToken(library)
  parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
    parseMetadataStar()
      listener: beginMetadataStar(library)
      listener: endMetadataStar(0)
    parseTopLevelKeywordDeclaration(, library, null, Instance of 'DirectiveContext')
      parseLibraryName(library)
        listener: beginUncategorizedTopLevelDeclaration(library)
        listener: beginLibraryName(library)
        parseQualified(library, libraryName, libraryNameContinuation)
          ensureIdentifier(library, libraryName)
            reportRecoverableErrorWithToken(enum, Instance of 'Template<(Token) => Message>')
              listener: handleRecoverableError(Message[ExpectedIdentifierButGotKeyword, 'enum' can't be used as an identifier because it's a keyword., Try renaming this to be an identifier that isn't a keyword., {lexeme: enum}], enum, enum)
            listener: handleIdentifier(enum, libraryName)
        ensureSemicolon(enum)
        listener: endLibraryName(library, ;)
  listener: endTopLevelDeclaration(main)
  parseTopLevelDeclarationImpl(;, Instance of 'DirectiveContext')
    parseMetadataStar(;)
      listener: beginMetadataStar(main)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl(;)
      listener: beginTopLevelMember(main)
      isReservedKeyword(()
      parseTopLevelMethod(;, null, null, ;, Instance of 'NoType', null, main, false)
        listener: beginTopLevelMethod(;, null, null)
        listener: handleNoType(;)
        ensureIdentifierPotentiallyRecovered(;, topLevelFunctionDeclaration, false)
          listener: handleIdentifier(main, topLevelFunctionDeclaration)
        parseMethodTypeVar(main)
          listener: handleNoTypeVariables(()
        parseGetterOrFormalParameters(main, main, false, MemberKind.TopLevelMethod)
          parseFormalParameters(main, MemberKind.TopLevelMethod)
            parseFormalParametersRest((, MemberKind.TopLevelMethod)
              listener: beginFormalParameters((, MemberKind.TopLevelMethod)
              listener: endFormalParameters(0, (, ), MemberKind.TopLevelMethod)
        parseAsyncModifierOpt())
          listener: handleAsyncModifier(null, null)
          inPlainSync()
        parseFunctionBody(), false, false)
          listener: beginBlockFunctionBody({)
          notEofOrValue(}, })
          listener: endBlockFunctionBody(0, {, })
        listener: endTopLevelMethod(main, null, })
  listener: endTopLevelDeclaration()
  reportAllErrorTokens(library)
  listener: endCompilationUnit(2, )