char caseFold(char c){
  if (alternateCasing) {
    if (c == 'I') {
      return 'ı';
    }
 else     if (c == 'İ') {
      return 'i';
    }
 else {
      return Character.toLowerCase(c);
    }
  }
 else {
    return Character.toLowerCase(c);
  }
}

char caseFold ( char c ) { if ( alternateCasing ) { if ( c == 'I' ) { return 'ı' ; } else if ( c == 'İ' ) { return 'i' ; } else { return Character . toLowerCase ( c ) ; } } else { return Character . toLowerCase ( c ) ; } }
folds single character ( according to lang if present )
