Ext.define('saas.override.util.Sorter', {
    override: 'Ext.util.Sorter',

    sortFn: function (item1, item2) {
        var me = this,
            transform = me._transform,
            root = me._root,
            property = me._property,
            lhs, rhs;
 
        if (root) {
            item1 = item1[root];
            item2 = item2[root];
        }
 
        lhs = item1[property] || '';
        rhs = item2[property] || '';
 
        if (transform) {
            lhs = transform(lhs);
            rhs = transform(rhs);
        }
 
        return (lhs > rhs) ? 1 : (lhs < rhs ? -1 : 0);
    },
});