close method
Implementation
Future<void> close() async {
if (_closed) {
return;
}
_closed = true;
for (final state in _transfers.values.toList(growable: false)) {
_failState(
state,
state.lastInvocation,
sinkFailedError,
'File receiver closed',
respond: false,
);
}
await _session.unregister(registration.registrationId);
}