Antlr4.Runtime.LexerNoViableAltException.ToString C# (CSharp) Method

        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);
        }
    }