docs: def list_units(self):
          """Return the current list of the Units in the fleet cluster
  
          Yields:
              Unit: The next Unit in the cluster
  
          Raises:
              fleet.v1.errors.APIError: Fleet returned a response code >= 400
  
          """
          for page in self._request('Units.List'):
              for unit in page.get('units', []):
                  yield Unit(client=self, data=unit)