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+Sencha Documentation Project/**
+ * @class Ext.util.Grouper
+ * @extends Ext.util.Sorter
+ */
+
+Ext.define('Ext.util.Grouper', {
+
+ /* Begin Definitions */
+
+ extend: 'Ext.util.Sorter',
+
+ /* End Definitions */
+
+ /**
+ * Function description
+ * @param {Ext.data.Model} instance The Model instance
+ * @return {String} The group string for this model
+ */
+ getGroupString: function(instance) {
+ return instance.get(this.property);
+ }
+});
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