@Override
        protected void handleRemovedElem(Map.Entry<LdapConfigBean, LDAPConnectionPool> eldest) {
            // When evicted, close the associated connection pool.
            LDAPConnectionPool pool = eldest.getValue();
            pool.close();
        }
@author Marc Savy {@literal <msavy@redhat.com>}
gateway/engine/core/src/main/java/io/apiman/gateway/engine/impl/LDAPConnectionFactory.java