clientv3/compact_op.go
func OpCompact(rev int64, opts ...CompactOption) CompactOp {
	ret := CompactOp{revision: rev}
	ret.applyCompactOpts(opts)
	return ret
}
func OpCompact(rev int64, opts ...CompactOption) CompactOp {
	ret := CompactOp{revision: rev}
	ret.applyCompactOpts(opts)
	return ret
}
// OpCompact wraps slice CompactOption to create a CompactOp.