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Rev 1130 | Rev 1271 | ||
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239 | /** |
239 | /** |
240 | * @return OIDplusGuid|null |
240 | * @return OIDplusGuid|null |
241 | */ |
241 | */ |
242 | public function one_up()/*: ?OIDplusGuid*/ { |
242 | public function one_up()/*: ?OIDplusGuid*/ { |
243 | // A GUID is a GUID, there is no hierarchy |
243 | // A GUID is a GUID, there is no hierarchy |
244 | return null; |
244 | return self::parse(self::ns().':'); |
245 | } |
245 | } |
246 | 246 | ||
247 | /** |
247 | /** |
248 | * @param OIDplusObject|string $to |
248 | * @param OIDplusObject|string $to |
249 | * @return int|null |
249 | * @return int|null |