/// <summary>
/// Implementation of slot.
/// </summary>
/// <param name="signaler">Signaler used to raise the signal.</param>
/// <param name="input">Arguments to slot.</param>
/// <returns>An awaitable task.</returns>
public async Task SignalAsync(ISignaler signaler, Node input)
{
var args = GetArguments(signaler, input);
await _service.SaveFileAsync(args.Stream, args.Destination);
}