getSizeValue method
Implementation
void getSizeValue(ffi.Pointer<CGSize> stret) {
_lib._objc_msgSend_useVariants1
? _lib._objc_msgSend_59_stret(stret, _id, _lib._sel_sizeValue1)
: stret.ref = _lib._objc_msgSend_59(_id, _lib._sel_sizeValue1);
}