rem: !aIID.equals(Components.interfaces.calIMutableItemBase)) 
add: !aIID.equals(Components.interfaces.calIItemOccurrence)) 
context:     QueryInterface: function (aIID) {        if (!aIID.equals(Components.interfaces.nsISupports) &&            !aIID.equals(Components.interfaces.calIMutableItemBase))        {            throw Components.results.NS_ERROR_NO_INTERFACE;        }        return this;    },
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/53752ec121ce645ca4d74ae67e225b35035d67b3/calItemBase.js/clean/calendar/base/src/calItemBase.js