/// <summary>
/// Send a XmppXElement asynchronous
/// </summary>
/// <param name="el"></param>
/// <returns></returns>
public virtual async Task SendAsync(XmppXElement el)
{
await Pipeline.WriteAndFlushAsync(el);
if (Pipeline.Contains <StreamManagementHandler>() &&
Pipeline.Get <StreamManagementHandler>().IsEnabled &&
(el.OfTypeAny <Xmpp.Base.Iq, Xmpp.Base.Presence, Xmpp.Base.Message>()))
{
await Pipeline.WriteAndFlushAsync(new Request());
}
}