private BoxManager(IRequestAuthenticator requestAuthenticator, IWebProxy proxy, BoxManagerOptions options, string onBehalfOf = null)
     : this()
 {
     requestAuthenticator.SetOnBehalfOf(onBehalfOf);
     _restClient = new BoxRestClient(requestAuthenticator, proxy, options);
     _uploadClient = new BoxUploadClient(requestAuthenticator, proxy, options);
 }
 private BoxManager(IRequestAuthenticator requestAuthenticator, IWebProxy proxy, BoxManagerOptions options)
     : this()
 {
     _restClient = new BoxRestClient(requestAuthenticator, proxy, options);
     _uploadClient = new BoxUploadClient(requestAuthenticator, proxy, options);
 }