/** * @class Ext.list.RootTreeItem * @extend Ext.list.AbstractTreeItem * This class implements the top-level node in a `{@link Ext.list.Tree treelist}`. Unlike * other nodes, this item is only a container for other items. It does not correspond to * a data record. * * @since 6.0.0 */ /** * This property is `true` to allow type checking for this or derived class. * @property {Boolean} [isRootListItem=true] * @readonly */