static/ext/src/state/Stateful.js
function(){
        var me = this,
            task = me.stateTask;

        if (task) {
            task.destroy();
            me.stateTask = null;
        }

        me.clearListeners();
    }
function(){
        var me = this,
            task = me.stateTask;

        if (task) {
            task.destroy();
            me.stateTask = null;
        }

        me.clearListeners();
    }
Destroys this stateful object.