code: def get_volumes_for_sdc(self, sdcObj):
          
          self.conn.connection._check_login()
          all_volumes = []
          response = self.conn.connection._do_get("{}/{}{}/{}".format(self.conn.connection._api_url, 'instances/Sdc::', sdcObj.id, 'relationships/Volume')).json()
          for sdc_volume in response:
              all_volumes.append(
                  Volume.from_dict(sdc_volume)
              )
          return all_volumes
docs: :param sdcObj: SDC object
          :return: list of Volumes attached to SDC
          :rtyoe: ScaleIO Volume object