code: def store(self, store=None, usage='both', mech=None,
                overwrite=False, set_default=False):
          if store is None:
              if rcred_rfc5588 is None:
                  raise NotImplementedError("Your GSSAPI implementation does "
                                            "not have support for RFC 5588")
              return rcred_rfc5588.store_cred(self, usage, mech,
                                              overwrite, set_default)
          else:
              if rcred_cred_store is None:
                  raise NotImplementedError("Your GSSAPI implementation does "
                                            "not have support for manipulating "
                                            "credential stores directly")
              store = _encode_dict(store)
              return rcred_cred_store.store_cred_into(store, self, usage, mech,
                                                      overwrite, set_default)