ATMLCommonLibrary.controls.signal.SignalControl.awbDropListTree_SignalSelected C# (CSharp) Method

        private void awbDropListTree_SignalSelected(object sender, XmlDocument tsfDocument )
        {
            var signal = sender as dbSignal;
            _currentSignalModel = sender as SignalModel;
            var bscName = sender as string;
            try
            {
                HourGlass.Start();
                Clear();
                if (!string.IsNullOrWhiteSpace( bscName ))
                {

                }
                else if (!LoadSignalModel( signal, tsfDocument ))
                {
                    LoadSignalModel( _currentSignalModel, tsfDocument );
                }
            }
            finally
            {
                HourGlass.Stop();
            }
        }