parseUnit(Foo)
  skipErrorTokens(Foo)
  listener: beginCompilationUnit(Foo)
  syntheticPreviousToken(Foo)
  parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
    parseMetadataStar()
      listener: beginMetadataStar(Foo)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl()
      listener: beginTopLevelMember(Foo)
      parseTopLevelMethod(, null, , Instance of 'SimpleTypeWith1Argument', null, f)
        listener: beginTopLevelMethod(, null)
        listener: handleIdentifier(Foo, typeReference)
        listener: beginTypeArguments(<)
        listener: handleIdentifier(int, typeReference)
        listener: handleNoTypeArguments(>)
        listener: handleType(int, null)
        listener: endTypeArguments(1, <, >)
        listener: handleType(Foo, null)
        ensureIdentifier(>, topLevelFunctionDeclaration)
          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)
              listener: endFormalParameters(0, (, ), MemberKind.TopLevelMethod)
        parseAsyncModifierOpt())
          listener: handleAsyncModifier(null, null)
          inPlainSync()
        parseFunctionBody(), false, false)
          listener: beginBlockFunctionBody({)
          notEofOrValue(}, })
          listener: endBlockFunctionBody(0, {, })
        listener: endTopLevelMethod(Foo, null, })
  listener: endTopLevelDeclaration()
  reportAllErrorTokens(Foo)
  listener: endCompilationUnit(1, )