fun minFresh(minFresh: Int, timeUnit: TimeUnit): CacheControl.Builder
Sets the minimum number of seconds that a response will continue to be fresh for. If the
response will be stale when minFresh have elapsed, the cached response will not be used and
a network request will be made.
minFresh - a non-negative integer. This is stored and transmitted with
TimeUnit.SECONDS precision; finer precision will be lost.