code: def list(self, resource):
          
          return self.service.list(
              resource, self.url_prefix, self.auth, self.session,
              self.session_send_opts)
docs: List metadata keys associated with the given resource.
  
          Args:
              resource (intern.resource.boss.BossResource): List keys associated with this resource.
  
          Returns:
              (list): List of key names.
  
          Raises:
              requests.HTTPError on failure.