code: def revoke_lease(self, lease_id):
          
          lease_revoke_request = etcdrpc.LeaseRevokeRequest(ID=lease_id)
          self.leasestub.LeaseRevoke(
              lease_revoke_request,
              self.timeout,
              credentials=self.call_credentials,
              metadata=self.metadata
          )
docs: Revoke a lease.
  
          :param lease_id: ID of the lease to revoke.