opLoadAndDelete    = mapOp("LoadAndDelete")
	opDelete           = mapOp("Delete")
	opSwap             = mapOp("Swap")
	opCompareAndSwap   = mapOp("CompareAndSwap")
	opCompareAndDelete = mapOp("CompareAndDelete")
	opClear            = mapOp("Clear")
)

var mapOps = [...]mapOp{
	opLoad,
	opStore,
	opLoadOrStore,
	opLoadAndDelete,
	opDelete,
	opSwap,
	opCompareAndSwap,
	opCompareAndDelete,
	opClear,

			}

			// Retry
			continue
		}

		startTime := time.Now()
		txnResp, err := s.client.KV.Txn(ctx).If(
			clientv3.Compare(clientv3.ModRevision(key), "=", origState.rev),
		).Then(
			clientv3.OpDelete(key),
		).Else(
			clientv3.OpGet(key),
		).Commit()
		metrics.RecordEtcdRequest("delete", s.groupResourceString, err, startTime)
		if err != nil {
			return err
		}
		if !txnResp.Succeeded {