public virtual System.String RetrieveMarker(Microsoft.PointOfService.MarkerType markerType, System.Int32 sessionNumber, System.Int32 documentNumber)
 {
     return(null);
 }
 public virtual System.String RetrieveMarkerByDateTime(Microsoft.PointOfService.MarkerType markerType, System.String dateTime, System.String markerNumber)
 {
     return(null);
 }
 public virtual System.String RetrieveCurrentMarker(Microsoft.PointOfService.MarkerType markerType)
 {
     return(null);
 }