rem: return this; 
add: return this.__proto__.QueryInterface.apply(this, aIID); 
context:     QueryInterface: function (aIID) {        if (!aIID.equals(Components.interfaces.nsISupports) &&            !aIID.equals(Components.interfaces.calIItemBase) &&            !aIID.equals(Components.interfaces.calITodo))        {            throw Components.results.NS_ERROR_NO_INTERFACE;        }        return this;    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/980c9cb8b36a2e43183f3cf587dff917290ddfd3/calTodo.js/buggy/calendar/base/src/calTodo.js