/** * @class Ext.util.Group * Encapsulates a grouped collection of records within a {@link Ext.util.Collection} */Ext.define('Ext.util.Group', { extend: 'Ext.util.Collection', config: { groupKey: null }, // Group collections must have a higher priority than normal collections. This ensures // that their endupdate handlers for filters and sorters run prior to the endupdate // handler of the store's main collection, and so when the user handles events such // as sort/datachanged, the groups have already been sorted and filtered. $endUpdatePriority: 2001, manageSorters: false});