code: public final Cache2kBuilder<K, V> resilienceDuration(long v, TimeUnit u) {
      config().setResilienceDuration(u.toMillis(v));
      return this;
    }
docs: Time span the cache will suppress loader exceptions if a value is available from
  a previous load. After the time span is passed the cache will start propagating
  loader exceptions. If {@link #suppressExceptions} is switched off, this setting
  has no effect.
  
  <p>Defaults to {@link #expireAfterWrite}. If {@link #suppressExceptions}
  is switched off, this setting has no effect.