private boolean isIdentifierChar(){
  if (_len >= 0 && _pos >= _len) {
    return false;
  }
  char ch=_working[_pos];
  return Character.isUnicodeIdentifierStart(ch) || Character.isDigit(ch) || Utils.isIdentifierHelperChar(ch);
}

private boolean isIdentifierChar ( ) { if ( _len >= 0 && _pos >= _len ) { return false ; } char ch = _working [ _pos ] ; return Character . isUnicodeIdentifierStart ( ch ) || Character . isDigit ( ch ) || Utils . isIdentifierHelperChar ( ch ) ; }
checks if character at current runtime position can be identifier part .
