method Deno.AtomicOperation.prototype.set
AtomicOperation.prototype.set(): this
Add to the operation a mutation that sets the value of the specified key
to the specified value if all checks pass during the commit.
Optionally an `expireIn` option can be specified to set a time-to-live
(TTL) for the key. The TTL is specified in milliseconds, and the key will
be deleted from the database at earliest after the specified number of
milliseconds have elapsed. Once the specified duration has passed, the
key may still be visible for some additional time. If the `expireIn`
option is not specified, the key will not expire.
this