The source code

    Ext.Direct.Event = function(config){
        Ext.apply(this, config);
    }
    Ext.Direct.Event.prototype = {
        status: true,
        getData: function(){
            return this.data;
        }
    };

    Ext.Direct.RemotingEvent = Ext.extend(Ext.Direct.Event, {
        type: 'rpc',
        getTransaction: function(){
            return this.transaction || Ext.Direct.getTransaction(this.tid);
        }
    });

    Ext.Direct.ExceptionEvent = Ext.extend(Ext.Direct.RemotingEvent, {
        status: false,
        type: 'exception'
    });

    Ext.Direct.eventTypes = {
        'rpc':  Ext.Direct.RemotingEvent,
        'event':  Ext.Direct.Event,
        'exception':  Ext.Direct.ExceptionEvent
    };