function refreshDumpMetadata refreshDumpMetadata(dumpId: string): Promise<Dump> Fetches a URL dump's preview again, bypassing the cache, and replaces its title and preview, for POST /api/dumps/:dumpId/metadata. The slug stays. Parameters dumpId: string Return Type Promise<Dump> Throws APIException 404 when there is no such dump, 400 when it isn't a URL dump, 502 when the page can't be reached.