Scriptable scope = cx.currentActivationCall;
if (scope == null) {
scope = getTopCallScope(cx);
}
XMLLib xmlLib = currentXMLLib(cx);
Object ns = xmlLib.toDefaultXmlNamespace(cx, namespace);
// XXX : this should be in separated namesapce from Scriptable.get/put
if (!scope.has(DEFAULT_NS_TAG, scope)) {
// XXX: this is racy of cause
ScriptableObject.defineProperty(scope, DEFAULT_NS_TAG, ns,