code: def check(self, radl):
          
          SIMPLE_FEATURES = {
              "name": (str, lambda x, _: bool(x.value)),
              "path": (str, lambda x, _: bool(x.value)),
              "version": (str, is_version),
              "preinstalled": (str, ["YES", "NO"])
          }
          self.check_simple(SIMPLE_FEATURES, radl)
docs: Check the features in this application.