parseUnit(Stream)
  skipErrorTokens(Stream)
  listener: beginCompilationUnit(Stream)
  syntheticPreviousToken(Stream)
  parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
    parseMetadataStar()
      listener: beginMetadataStar(Stream)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl()
      listener: beginTopLevelMember(Stream)
      parseTopLevelMethod(, null, , Instance of 'ComplexTypeInfo', null, foo, false)
        listener: beginTopLevelMethod(, null)
        ensureIdentifier(, typeReference)
          listener: handleIdentifier(Stream, typeReference)
        listener: beginTypeArguments(<)
        ensureIdentifier(<, typeReference)
          listener: handleIdentifier(List, typeReference)
        listener: beginTypeArguments(<)
        reportRecoverableErrorWithToken(>>, Instance of 'Template<(Token) => Message>')
          listener: handleRecoverableError(Message[ExpectedType, Expected a type, but got '>>'., null, {lexeme: >>}], >>, >>)
        rewriter()
        listener: handleIdentifier(, typeReference)
        listener: handleNoTypeArguments(>>)
        listener: handleType(, null)
        listener: endTypeArguments(1, <, >)
        listener: handleType(List, null)
        listener: endTypeArguments(1, <, >)
        listener: handleType(Stream, null)
        ensureIdentifierPotentiallyRecovered(>, topLevelFunctionDeclaration, false)
          listener: handleIdentifier(foo, topLevelFunctionDeclaration)
        parseMethodTypeVar(foo)
          listener: handleNoTypeVariables(()
        parseGetterOrFormalParameters(foo, foo, false, MemberKind.TopLevelMethod)
          parseFormalParameters(foo, 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(Stream, null, })
  listener: endTopLevelDeclaration()
  reportAllErrorTokens(Stream)
  listener: endCompilationUnit(1, )