acceptLowAlphaNumeric2to8 method
Advances and returns true if current subtag is alphanumeric, with length ranging from 2 to 8.
Implementation
bool acceptLowAlphaNumeric2to8() {
if (atEnd()) return false;
if (!_alphaNumeric1to8RegExp.hasMatch(_current) || _current.length < 2) {
return false;
}
advance();
return true;
}