code: def set_fee_asset(self, fee_asset):
          
          if isinstance(fee_asset, self.amount_class):
              self.fee_asset_id = fee_asset["id"]
          elif isinstance(fee_asset, self.asset_class):
              self.fee_asset_id = fee_asset["id"]
          elif fee_asset:
              self.fee_asset_id = fee_asset
          else:
              self.fee_asset_id = "1.3.0"
docs: Set asset to fee