docs: def check_is_injectable(func):
      """
      Decorator that will check whether the "inj_name" keyword argument to
      the wrapped function matches a registered Orca injectable.
  
      """
      @wraps(func)
      def wrapper(**kwargs):
          name = kwargs['inj_name']
          if not orca.is_injectable(name):
              abort(404)
          return func(**kwargs)
      return wrapper