manageCompleter<T> method
Ensure that a completer is completed when the object is disposed.
If the completer has not been completed by the time the object
is disposed, it will be completed with an ObjectDisposedException
error.
Implementation
@override
Completer<T> manageCompleter<T>(Completer<T> completer) =>
_getDisposableProxy().manageCompleter<T>(completer);