docs: public ServiceFuture<VpnProfileResponseInner> beginGenerateVpnProfileAsync(String resourceGroupName, String gatewayName, AuthenticationMethod authenticationMethod, final ServiceCallback<VpnProfileResponseInner> serviceCallback) {
          return ServiceFuture.fromResponse(beginGenerateVpnProfileWithServiceResponseAsync(resourceGroupName, gatewayName, authenticationMethod), serviceCallback);
      }