public ClientCacheControlBuilder maxStale(boolean maxStale) {
        maxStaleSeconds = maxStale ? ClientCacheControl.UNSPECIFIED_MAX_STALE : -1;
        return this;
    }
Enables or disables the {@code "max-stale"} directive.

@param maxStale {@code true} to enable without a value or {@code false} to disable.
core/src/main/java/com/linecorp/armeria/common/ClientCacheControlBuilder.java