performBlock_ method
Implementation
void performBlock_(ObjCBlock_ffiVoid block) {
_lib._objc_msgSend_531(_id, _lib._sel_performBlock_1, block._id);
}
void performBlock_(ObjCBlock_ffiVoid block) {
_lib._objc_msgSend_531(_id, _lib._sel_performBlock_1, block._id);
}