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/**
* @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
});