return NS_ERROR_NOT_IMPLEMENTED;
*_retval = PR_FALSE; if (mObservers) { PRUint32 count; mObservers->Count(&count); for (PRUint32 i = 0; i < count; ++i) { nsCOMPtr<nsIXULOutlinerBuilderObserver> observer; mObservers->QueryElementAt(i, NS_GET_IID(nsIXULOutlinerBuilderObserver), getter_AddRefs(observer)); if (observer) { observer->CanDropBeforeAfter(index, before, _retval); if (*_retval) break; } } }  return NS_OK;
nsXULOutlinerBuilder::CanDropBeforeAfter(PRInt32 index, PRBool before, PRBool *_retval){    return NS_ERROR_NOT_IMPLEMENTED;}