rem: if (this.mImmutable) throw Components.results.NS_ERROR_FAILURE; 
add: this.modify(); 
context:     setProperty: function (aName, aValue) {        if (this.mImmutable)            throw Components.results.NS_ERROR_FAILURE;        this.mProperties.setProperty(aName, aValue);    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/1ba290d760cf7333c2b0bcaa7899cff74a8efaad/calAttendee.js/clean/calendar/base/src/calAttendee.js