KV Get
Consistency level for reads.
Strong consistency (also known as linearizability) guarantees that a read will see all previous writes. Weak consistency allows stale reads, but can save one or more round trip to the leader.
{ "namespace": "some_namespace", "key": "some_key" }
Time of expiry
Opaque version token for optimistic concurrency control. Pass as version in a subsequent set to perform a conditional write.