static/ext/src/ux/event/Driver.js
function () {
        var me = this;

        if (me.active) {
            me.active = null;
            me.onStop();
            me.fireEvent('stop', me);
        }
    }
function () {
        var me = this;

        if (me.active) {
            me.active = null;
            me.onStop();
            me.fireEvent('stop', me);
        }
    }
Stops this object. If this object is not started, nothing happens.