func acquire(s server.TestServer, descID sqlbase.ID, version sqlbase.DescriptorVersion) (*csql.LeaseState, error) {
var lease *csql.LeaseState
err := s.DB().Txn(func(txn *client.Txn) error {
var err error
lease, err = s.LeaseManager().(*csql.LeaseManager).Acquire(txn, descID, version)
return err
})
return lease, err
}