rem: !aIID.equals(Components.interfaces.nsITransaction)) 
add: !aIID.equals(Components.interfaces.nsITransaction) && !aIID.equals(Component.interfaces.calIOperationListener)) 
context:     QueryInterface: function (aIID) {        if (!aIID.equals(Components.interfaces.nsISupports) &&            !aIID.equals(Components.interfaces.nsITransaction))        {            throw Components.results.NS_ERROR_NO_INTERFACE;        }        return this;    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/7768c950350f5bd6d0e17764904855ddcee65587/calendar-item-editing.js/clean/calendar/base/content/calendar-item-editing.js