Irony.Parsing.ParsingContext.FormatUnexpectedInputErrorMessage C# (CSharp) Метод

    internal string FormatUnexpectedInputErrorMessage() {
      string msg;
      var expectedSet = GetExpectedTermSet();
      msg = Language.Grammar.ConstructParserErrorMessage(this, expectedSet);
      if (string.IsNullOrEmpty(msg))
        msg = Resources.ErrSyntaxErrorNoInfo;
      return msg; 
    }