Call operator for objc.ObjCBlock<objc.CGSize Function(ffi.Pointer<ffi.Void>, CALayer)>.
objc.ObjCBlock<objc.CGSize Function(ffi.Pointer<ffi.Void>, CALayer)>
Available on ObjCBlock<CGSize Function(Pointer<Void>, CALayer)>, provided by the ObjCBlock_CGSize_ffiVoid_CALayer_CallExtension extension