code: def from_composition_and_entries(comp, entries_in_chemsys,
                                       working_ion_symbol="Li"):
          
          pd = PhaseDiagram(entries_in_chemsys)
          return ConversionElectrode.from_composition_and_pd(comp, pd,
                                                             working_ion_symbol)
docs: Convenience constructor to make a ConversionElectrode from a
          composition and all entries in a chemical system.
  
          Args:
              comp: Starting composition for ConversionElectrode, e.g.,
                  Composition("FeF3")
              entries_in_chemsys: Sequence containing all entries in a
                 chemical system. E.g., all Li-Fe-F containing entries.
              working_ion_symbol: Element symbol of working ion. Defaults to Li.