stringByAppendingPathComponent method
      
NSString
stringByAppendingPathComponent(
    
- NSString str
stringByAppendingPathComponent:
Implementation
objc.NSString stringByAppendingPathComponent(objc.NSString str) {
  final _ret = _objc_msgSend_1sotr3r(this.ref.pointer, _sel_stringByAppendingPathComponent_, str.ref.pointer);
  return objc.NSString.castFromPointer(_ret, retain: true, release: true);
}