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