onCancel property

ControllerCancelCallback onCancel

The callback which is called when the stream is canceled.

May be set to null, in which case no callback will happen.

Implementation

@override
ControllerCancelCallback get onCancel => controller.onCancel;
void onCancel= (void onCancelHandler())

Implementation

@override
set onCancel(void onCancelHandler()) {
  controller.onCancel = onCancelHandler;
}