final BoxConnectionManagerBuilder connectionManager = connectionManagerBuilder != null
? connectionManagerBuilder : new BoxConnectionManagerBuilder();
// create REST client for BoxClient
final ClientConnectionManager[] clientConnectionManager = new ClientConnectionManager[1];
final IBoxRESTClient restClient = new BoxRESTClient(connectionManager.build()) {
@Override
public HttpClient getRawHttpClient() {
final HttpClient httpClient = super.getRawHttpClient();
clientConnectionManager[0] = httpClient.getConnectionManager();
final SchemeRegistry schemeRegistry = clientConnectionManager[0].getSchemeRegistry();