Returns the unstable entries for the electrode.

        Args:
            charge_to_discharge: Order from most charge to most discharged
                state? Defaults to True.

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

def get_unstable_entries(self, charge_to_discharge=True):
        """
        Returns the unstable entries for the electrode.

        Args:
            charge_to_discharge: Order from most charge to most discharged
                state? Defaults to True.

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