137 		treeInit: function (ctx) {  argument
151 					ctx2 = ctx.tree._makeHookContext(node, event);
152 					ctx.tree._callHook("nodeSetActive", ctx2, true);
156 		nodeSetActive: function (ctx, flag, callOpts) {  argument
158 				opts = ctx.options.gridnav,
159 				node = ctx.node,
160 				event = ctx.originalEvent || {},
168 				if (ctx.options.titlesTabbable) {
174 					ctx.tree.$container.attr("tabindex", "-1");
184 		nodeKeydown: function (ctx) {  argument
188 				opts = ctx.options.gridnav,
189 				event = ctx.originalEvent,