Le 08/06/2024 à 17:04, Jürgen Spitzmüller a écrit : > Am Samstag, dem 08.06.2024 um 16:29 +0200 schrieb Jean-Marc Lasgouttes: >> Maybe required(name)? > > We already have the required() member which returns the whole set. > requiresFeature(name)? Yes, why not. Some members have required() that return a single value. JMarc