```\n    if (\n      mapPrefix == _LSP10_VAULTS_MAP_KEY_PREFIX && notifier.code.length > 0 &&\n         !notifier.supportsERC165InterfaceUnchecked(_INTERFACEID_LSP9)\n    ) {\n        return "LSP1: not an LSP9Vault ownership transfer";\n     }\n```\n