func HookKeyIndex(row r.Term) interface{} {
	return []interface{}{row.Field("DownloadID"), row.Field("RequestID")}
}
func ResourceKeyIndex(row r.Term) interface{} {
	return []interface{}{row.Field("URL"), row.Field("Metadata").Field("ETag")}
}
func URLETagIndex(row r.Term) interface{} {
	return []interface{}{
		row.Field("URL"),
		row.Field("Metadata").Field("ETag")}
}