*aResult = NULL; return NS_ERROR_NOT_IMPLEMENTED;
if (!elements) return NS_ERROR_INVALID_POINTER;  nsresult rv; rv = LoadProperties(); if (NS_FAILED(rv)) return rv;  return mProps->SimpleEnumerateProperties(elements);
nsresult nsExtensibleStringBundle::GetSimpleEnumeration(nsISimpleEnumerator ** aResult){  // XXX write me  *aResult = NULL;  return NS_ERROR_NOT_IMPLEMENTED;}