The URL a manifest key resolves to, for the release that pairs with a loadFromManifest — the manager is keyed by URL, and a caller that only ever saw the logical key would otherwise have to reach into the manifest itself.
release
The URL, or undefined when the manifest does not name the key.
undefined
The URL a manifest key resolves to, for the
releasethat pairs with a loadFromManifest — the manager is keyed by URL, and a caller that only ever saw the logical key would otherwise have to reach into the manifest itself.