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