code: def get_metadata(self, resource, keys):
          
          self.metadata_service.set_auth(self._token_metadata)
          return self.metadata_service.get(resource, keys)
docs: Gets the values for given keys associated with the given resource.
  
          Args:
              resource (intern.resource.boss.BossResource)
              keys (list)
  
          Returns:
              (dictionary)
  
          Raises:
              HTTPErrorList on failure.