/// <summary>
/// Helper function to set the Unsubscribe flag and send the message over the link.
/// </summary>
/// <param name="message">The subscription request to send.</param>
/// <returns>
/// <c>true</c>, if the message has been serialized and sent properly,
/// <c>false</c>, if the socket is unavailable.
/// </returns>
public async virtual Task <bool> SendUnsubscribeAsync(SubscriptionRequest message)
{
message.setSubRequestType(SubscriptionRequest.ReqType.Unsubscribe);
return(await this.SendMessageAsync(message));
}