code: def get_unstable_entries(self, charge_to_discharge=True):
          
          list_copy = list(self._unstable_entries)
          return list_copy if charge_to_discharge else list_copy.reverse()
docs: 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.