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