[SOLVED]ExtJS for CMPs (REVO 2.3.0) - Question about combo-boxes

/**
 * @class Class.combo.name
 * @extends MODx.combo.ComboBox
 * @param {Object} config
 * @xtype class-combo-name
 */
Class.combo.name = function(config) {
    config = config || {};

    Ext.applyIf(config, {
        name : 'field'
        ,hiddenName : 'field'
        ,pageSize: 10
        ,forceSelection: true
        ,selectOnFocus: true
        ,displayField : 'name'
        ,valueField : 'id'
        ,fields: ['id', 'name']
        ,triggerAction : 'all'
        ,lazyRender: true
        ,editable : true
        ,typeAhead: true
        ,minChars: 1
        ,allowBlank: false
        ,url: Class.config.connector_url
        ,listWidth: 0
        ,baseParams: {
            action: 'mgr/action/getlist'
            ,combo: true
        }
    });
    Class.combo.name.superclass.constructor.call(this, config);
};
Ext.extend(Class.combo.name, MODx.combo.ComboBox);
Ext.reg('class-combo-name', Class.combo.name);