// Resources.getString("action.objectgroup.add.tooltip"), Resources.getImageDescriptor("new-object-layer.png"));
// }
protected void doPerformAction() {
Map currentMap = editor.getMap();
MapLayer newGroup = currentMap.addObjectGroup();
editor.setCurrentLayer(currentMap.getTotalLayers() - 1);
if (viewer != null)
viewer.editElement(newGroup,0);
}