willRemoveSubview method
willRemoveSubview:
Implementation
void willRemoveSubview(UIView subview) {
objc.checkOsVersionInternal('UIView.willRemoveSubview:', iOS: (false, (2, 0, 0)));
_objc_msgSend_xtuoz7(this.ref.pointer, _sel_willRemoveSubview_, subview.ref.pointer);
}