public static void executeNodeAction(DBXTreeNodeHandler.Action action, Object node, IServiceLocator serviceLocator) {
        executeNodeAction(action, node, null, serviceLocator);
    }
Find selected node for specified UI element
@param element ui element
@return node or null
plugins/org.jkiss.dbeaver.ui.navigator/src/org/jkiss/dbeaver/ui/navigator/NavigatorUtils.java