in lib/parser.dart [168:182]
String toString() {
var buff = StringBuffer('$runtimeType : [');
for (var i = 0; i < _lineStart.length; i++) {
buff
..write('(')
..write(_lineStart[i])
..write(',')
..write(_columnStart[i])
..write(':')
..write(_maps[i])
..write(')');
}
buff.write(']');
return buff.toString();
}