public override string ToString(){string symbol = string.Empty;if (startIndex >= 0 && startIndex < ((ICharStream)InputStream).Size){symbol = ((ICharStream)InputStream).GetText(Interval.Of(startIndex, startIndex));symbol = Utils.EscapeWhitespace(symbol, false);}return string.Format(CultureInfo.CurrentCulture, "{0}('{1}')", typeof(Antlr4.Runtime.LexerNoViableAltException).Name, symbol);}