Get the stable entries.

        Args:
            charge_to_discharge: order from most charge to most discharged
                state? Default to True.

        Returns:
            A list of stable entries in the electrode, ordered by amount of the
            working ion.

def get_stable_entries(self, charge_to_discharge=True):
        """
        Get the stable entries.

        Args:
            charge_to_discharge: order from most charge to most discharged
                state? Default to True.

        Returns:
            A list of stable entries in the electrode, ordered by amount of the
            working ion.
        """
        list_copy = list(self._stable_entries)
        return list_copy if charge_to_discharge else list_copy.reverse()