cancel method
Cancels the current listen for speech if active, does nothing if not.
Canceling means that there will be no final result returned from the
recognizer. Each listen session should be ended with either stop
or
cancel
, for example in the dispose method of a Widget. cancel
is
automatically invoked by a permanent error if cancelOnError
is set
to true in the listen
call.
Note Cannot be used until a successful initialize
call. Should only
be used after a successful listen
call.
Implementation
Future<void> cancel() {
throw UnimplementedError('cancel() has not been implemented.');
}