rem: sip2.data = aItem; 
add: sip2.data = aOtherItem; 
context: function compareItems(aItem, aOtherItem) {    var sip1 = Cc["@mozilla.org/supports-interface-pointer;1"].               createInstance(Ci.nsISupportsInterfacePointer);    sip1.data = aItem;    sip1.dataIID = Ci.calIItemBase;    var sip2 = Cc["@mozilla.org/supports-interface-pointer;1"].               createInstance(Ci.nsISupportsInterfacePointer);    sip2.data = aItem;    sip2.dataIID = Ci.calIItemBase;    return sip1.data == sip2.data;}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/aa900bd775bef22a2b7a5a3fb408f18ca752064b/calUtils.js/clean/calendar/base/src/calUtils.js