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