public CacheControlBuilder maxAge(@Nullable Duration maxAge) {
        maxAgeSeconds = validateDuration(maxAge, "maxAge");
        return this;
    }
Enables or disables the {@code "max-age"} directive.

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