public static bool ExecuteMarkerAction(MarkerAction markerAction, IEnumerable <IMarker> markers)
 {
     if (markers != null && markers.Any() && markerAction.Validate(markers) == ActionValidity.Valid)
     {
         if (markerAction.HasAutoUndo())
         {
             UndoExtensions.RegisterMarkers(markers, markerAction.GetUndoName());
         }
         return(markerAction.Execute(markers));
     }
     return(false);
 }
 static void BuildMenu(MarkerAction action, IEnumerable <IMarker> markers, List <MenuActionItem> menuItems, MenuFilter filter)
 {
     BuildMenu(action, action.Validate(markers), () => ExecuteMarkerAction(action, markers), menuItems, filter);
 }