withTtl
Construct metadata with specified time to live in seconds.
TTL specifies the minimum time the SyncMap Item will live, sometime soon after this time the object will be deleted.
If time to live is not specified, object lives infinitely long.
TTL could be used in order to auto-recycle old unused objects, but it is not recommended to build some app logic like timers using ttl.
Return
Metadata object with given ttl.
Parameters
duration
Time to live in seconds from now.