completeDone method
Implementation
void completeDone(TcccCallResult result) {
_result = result;
_statusNotifier.value = status.copyWith(
state: TcccCallState.ending,
lastCause: result.cause,
lastFailure: result.failure,
lastOriginator: result.originator,
);
if (!_ended.isCompleted) {
_ended.complete(result);
}
}