def utility(self, role):
"""The utility of the current state for the given role."""
with Frame():
utility = Term()
utility_query = self._goal_functor(
Term.from_atom(role._atom), utility)
self._query_term(utility_query)(check=True)
if utility.is_atom():
return int(utility.get_atom_name())
else:
return int(utility)
