The source code

    /**
     * @class Ext.data.Response
     * A generic response class to normalize response-handling internally to the framework.
     */
    Ext.data.Response = function(params) {
        Ext.apply(this, params);
    };
    Ext.data.Response.prototype = {
        /**
         * @cfg {String} action {@link Ext.data.Api#actions}
         */
        action: undefined,
        /**
         * @cfg {Boolean} success
         */
        success : undefined,
        /**
         * @cfg {String} message
         */
        message : undefined,
        /**
         * @cfg {Array/Object} data
         */
        data: undefined,
        /**
         * @cfg {Object} raw The raw response returned from server-code
         */
        raw: undefined,
        /**
         * @cfg {Ext.data.Record/Ext.data.Record[]} records related to the Request action
         */
        records: undefined
    };