parseUnit(class)
  skipErrorTokens(class)
  listener: beginCompilationUnit(class)
  syntheticPreviousToken(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)
          reportRecoverableErrorWithToken(operator, Instance of 'Template<(Token) => Message>')
            listener: handleRecoverableError(Message[BuiltInIdentifierInDeclaration, Can't use 'operator' as a name here., null, {lexeme: operator}], operator, operator)
          listener: handleIdentifier(operator, classOrMixinDeclaration)
        listener: handleNoTypeVariables({)
        listener: beginClassDeclaration(class, null, null, null, operator)
        parseClass(operator, class, class, operator)
          parseClassHeaderOpt(operator, class, class)
            parseClassExtendsOpt(operator)
              listener: handleNoType(operator)
              listener: handleClassExtends(null, 1)
            parseClassWithClauseOpt(operator)
              listener: handleClassNoWithClause()
            parseClassOrMixinOrEnumImplementsOpt(operator)
              listener: handleImplements(null, 0)
            listener: handleClassHeader(class, class, null)
          parseClassOrMixinOrExtensionBody(operator, DeclarationKind.Class, operator)
            listener: beginClassOrMixinOrExtensionBody(DeclarationKind.Class, {)
            notEofOrValue(}, operator)
            parseClassOrMixinOrExtensionOrEnumMemberImpl({, DeclarationKind.Class, operator)
              parseMetadataStar({)
                listener: beginMetadataStar(operator)
                listener: endMetadataStar(0)
              listener: beginMember()
              parseMethod({, null, null, null, null, null, null, null, {, Instance of 'NoType', null, operator, DeclarationKind.Class, operator, false)
                listener: beginMethod(DeclarationKind.Class, null, null, null, null, null, null, operator)
                listener: handleNoType({)
                parseOperatorName({)
                  listener: handleOperatorName(operator, ^)
                parseMethodTypeVar(^)
                  listener: handleNoTypeVariables(()
                parseGetterOrFormalParameters(^, operator, false, MemberKind.NonStaticMethod)
                  parseFormalParameters(^, MemberKind.NonStaticMethod)
                    parseFormalParametersRest((, MemberKind.NonStaticMethod)
                      listener: beginFormalParameters((, MemberKind.NonStaticMethod)
                      parseFormalParameter((, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
                        parseMetadataStar(()
                          listener: beginMetadataStar(int)
                          listener: endMetadataStar(0)
                        listener: beginFormalParameter(int, MemberKind.NonStaticMethod, 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.mandatory, MemberKind.NonStaticMethod)
                      listener: endFormalParameters(1, (, ), MemberKind.NonStaticMethod)
                parseInitializersOpt())
                  listener: handleNoInitializers()
                parseAsyncModifierOpt())
                  listener: handleAsyncModifier(null, null)
                  inPlainSync()
                inPlainSync()
                parseFunctionBody(), false, true)
                  listener: beginBlockFunctionBody({)
                  notEofOrValue(}, })
                  listener: endBlockFunctionBody(0, {, })
                listener: endClassConstructor(null, operator, (, null, })
              listener: endMember()
            notEofOrValue(}, })
            listener: endClassOrMixinOrExtensionBody(DeclarationKind.Class, 1, {, })
          listener: endClassDeclaration(class, })
  listener: endTopLevelDeclaration()
  reportAllErrorTokens(class)
  listener: endCompilationUnit(1, )