sizeWithFont$2 method
sizeWithFont:constrainedToSize:
Implementation
objc.CGSize sizeWithFont$2(UIFont font, {required objc.CGSize constrainedToSize}) {
objc.checkOsVersionInternal('NSString.sizeWithFont:constrainedToSize:', iOS: (false, (2, 0, 0)));
  final _ptr = pkg_ffi.calloc<objc.CGSize>();
  objc.useMsgSendVariants ? _objc_msgSend_xq5db9Stret(_ptr, this.ref.pointer, _sel_sizeWithFont_constrainedToSize_, font.ref.pointer, constrainedToSize) : _ptr.ref = _objc_msgSend_xq5db9(this.ref.pointer, _sel_sizeWithFont_constrainedToSize_, font.ref.pointer, constrainedToSize);
  final _finalizable = _ptr.cast<ffi.Uint8>().asTypedList(
      ffi.sizeOf<objc.CGSize>(), finalizer: pkg_ffi.calloc.nativeFree);
  return ffi.Struct.create<objc.CGSize>(_finalizable);
}