on method Null safety
- {VoidCallback? done,
- VoidCallback? success,
- VoidCallback? dispose,
- void error( )?}
Implementation
void on(
{VoidCallback? done,
VoidCallback? success,
VoidCallback? dispose,
void Function(Object)? error}) {
if (done != null) _doneEmitter.on(done);
if (success != null) _successEmitter.on(success);
if (dispose != null) _disposeEmitter.on(dispose);
if (error != null) _errorEmitter.on(error);
}