/** * This class contains remote group information about virtual stores and provides * a similar interface to `Ext.data.Group`. * @since 6.5.0 */Ext.define('Ext.data.virtual.Group', { isVirtualGroup: true, firstRecords: null, id: '', summaryRecord: null, constructor: function(key) { this.id = key; this.firstRecords = []; }, first: function() { return this.firstRecords[0] || null; }, getGroupKey: function() { return this.id; }, getSummaryRecord: function() { return this.summaryRecord; }});