clientv3/op.go
func OpTxn(cmps []Cmp, thenOps []Op, elseOps []Op) Op {
	return Op{t: tTxn, cmps: cmps, thenOps: thenOps, elseOps: elseOps}
}
func OpTxn(cmps []Cmp, thenOps []Op, elseOps []Op) Op {
	return Op{t: tTxn, cmps: cmps, thenOps: thenOps, elseOps: elseOps}
}
func OpTxn ( cmps [ ] Cmp , thenOps [ ] Op , elseOps [ ] Op ) Op { return Op { t : tTxn , cmps : cmps , thenOps : thenOps , elseOps : elseOps } }
// OpTxn returns "txn" operation based on given transaction conditions.
OpTxn returns txn operation based on given transaction conditions .