docs: def volume_create(self, name, size=100, snapshot=None, voltype=None,
                        availability_zone=None):
          '''
          Create a block device
          '''
          if self.volume_conn is None:
              raise SaltCloudSystemExit('No cinder endpoint available')
          nt_ks = self.volume_conn
          response = nt_ks.volumes.create(
              size=size,
              display_name=name,
              volume_type=voltype,
              snapshot_id=snapshot,
              availability_zone=availability_zone
          )
  
          return self._volume_get(response.id)