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