code: def release_scheme(self, value):
          
          if value not in KNOWN_RELEASE_SCHEMES:
              msg = "Release scheme %r is not supported! (valid options are %s)"
              raise ValueError(msg % (value, concatenate(map(repr, KNOWN_RELEASE_SCHEMES))))
          set_property(self, 'release_scheme', value)
docs: Validate the release scheme.