public object SendRequest(Message message)
        {
            var context = new CompletionSource <object>();

            contexts[message.Guid] = context;
            try
            {
                SendMessage(message);
                var membershipServiceOptions = GetMembershipServiceOptions(message.SendingSlio);
                return(context.GetResult(membershipServiceOptions.RequestTimeout));
            }
            finally
            {
                contexts.TryRemove(message.Guid, out _);
                context.Dispose();
            }
        }