code: def _MergeEntities(self, a, b):
      
      scheme = {'price': self._MergeIdentical,
                'currency_type': self._MergeIdentical,
                'payment_method': self._MergeIdentical,
                'transfers': self._MergeIdentical,
                'transfer_duration': self._MergeIdentical}
      return self._SchemedMerge(scheme, a, b)
docs: Merges the fares if all the attributes are the same.