A parameter object must be a plain object (or undefined, for "none") whose own keys
are all in known. A misspelled or unknown key (region for regions, Ressort), or a
__proto__ key from JSON.parse, used to be ignored without a word, so
news({ region: ["9"] }) returned the national feed as if it were Niedersachsen's.
Returns a Problem naming the first unknown key (cut, JSON-quoted) and the known ones.
A parameter object must be a plain object (or
undefined, for "none") whose own keys are all inknown. A misspelled or unknown key (regionforregions,Ressort), or a__proto__key fromJSON.parse, used to be ignored without a word, sonews({ region: ["9"] })returned the national feed as if it were Niedersachsen's. Returns aProblemnaming the first unknown key (cut, JSON-quoted) and the known ones.