def state_fluent_variables(self) -> FluentParamsList:
        '''Returns the instantiated state fluents in canonical order.

        Returns:
            Sequence[Tuple[str, List[str]]]: A tuple of pairs of fluent name
            and a list of instantiated fluents represented as strings.
        '''
        fluents = self.domain.state_fluents
        ordering = self.domain.state_fluent_ordering
        return self._fluent_params(fluents, ordering)