public ClientCacheControlBuilder staleIfErrorSeconds(long staleIfErrorSeconds) {
        this.staleIfErrorSeconds = validateSeconds(staleIfErrorSeconds, "staleIfErrorSeconds");
        return this;
    }
Enables the {@code "stale-if-error"} directive.

@param staleIfErrorSeconds the value in seconds.
core/src/main/java/com/linecorp/armeria/common/ClientCacheControlBuilder.java