+/// Event ID that order of objects in group is changed,
+/// so, tree must be fully rectreated (movement of feature)
+static const char * EVENT_ORDER_UPDATED = "OrderUpdated";
+/// Event ID that the sketch is prepared and all grouped messages for the solver may be flushed
+static const char * EVENT_UPDATE_SELECTION = "UpdateSelection";
+
+/// Request for the enabled/disabled actions behavior for some specific features