docs: def from_id(cls, id):
          """Load a `cls` entity and instantiate the Context it stores."""
          from furious.context import Context
  
          # TODO: Handle exceptions and retries here.
          entity = cls.get_by_id(id)
          if not entity:
              raise FuriousContextNotFoundError(
                  "Context entity not found for: {}".format(id))
  
          return Context.from_dict(entity.context)