public ClientCacheControlBuilder minFresh(@Nullable Duration minFresh) {
        minFreshSeconds = validateDuration(minFresh, "minFresh");
        return this;
    }
Enables or disables the {@code "min-fresh"} directive.

@param minFresh the value of the directive to enable, or {@code null} to disable.
core/src/main/java/com/linecorp/armeria/common/ClientCacheControlBuilder.java