public Expiry<Integer, Integer> expiry() {
  return expiry;
}
 

public <K, V> Expiry<K, V> build() {
  return new FixedExpiry<K, V>(createNanos, updateNanos, readNanos);
}
 

/**
 * Returns the {@link Factory} for the {@link Expiry} to be used for the cache.
 *
 * @return the {@link Factory} for the {@link Expiry}
 */
public Optional<Factory<Expiry<K, V>>> getExpiryFactory() {
  return Optional.ofNullable(expiryFactory);
}
 

/**
 * Set the {@link Factory} for the {@link Expiry}.
 *
 * @param factory the {@link Expiry} {@link Factory}
 */
@SuppressWarnings("unchecked")
public void setExpiryFactory(Optional<Factory<? extends Expiry<K, V>>> factory) {
  expiryFactory = (Factory<Expiry<K, V>>) factory.orElse(null);
}