code: def _default_objc(self):
          
          objc = ctypes.cdll.LoadLibrary(find_library('objc'))
          objc.objc_getClass.restype = ctypes.c_void_p
          objc.sel_registerName.restype = ctypes.c_void_p
          objc.objc_msgSend.restype = ctypes.c_void_p
          objc.objc_msgSend.argtypes = [ctypes.c_void_p, ctypes.c_void_p]
          return objc
docs: Load the objc library using ctypes.