I'ld like to configure my forms using config with an ini file. I need individualized error messages like the following one: suche.elements.methode.options.validators.strlen.options.messages.stringLengthTooLong = "Der Suchbegriff '%value%' ist zu lang!" This works well for strlen and regex, but how do I set it up for "required" elements? I tried stuff like suche.elements.methode.options.validators.notempty.options.messages.isEmpty = "Der Suchbegriff darf nicht leer sein!" but this throws exceptions.