code: def _cast_repr(self, caster, *args, **kwargs):
          
          if self.__repr_content is None:
              self.__repr_content = hash_and_truncate(self)
              assert self.__uses_default_repr  # Sanity check: we are indeed using the default repr here.  If this has ever changed, something went wrong.
  
          return caster(self.__repr_content, *args, **kwargs)
docs: Will cast this constant with the provided caster, passing args and kwargs.
  
          If there is no registered representation, will hash the name using sha512 and use the first 8 bytes
          of the digest.