performSelector method
performSelector:
Implementation
objc.ObjCObject performSelector(ffi.Pointer<objc.ObjCSelector> aSelector) {
final $ret = _objc_msgSend_3ctkt6(
object$.ref.pointer,
_sel_performSelector_,
aSelector,
);
return objc.ObjCObject($ret, retain: true, release: true);
}