code: public ServiceFuture<String> vpnDeviceConfigurationScriptAsync(String resourceGroupName, String virtualNetworkGatewayConnectionName, VpnDeviceScriptParameters parameters, final ServiceCallback<String> serviceCallback) {
          return ServiceFuture.fromResponse(vpnDeviceConfigurationScriptWithServiceResponseAsync(resourceGroupName, virtualNetworkGatewayConnectionName, parameters), serviceCallback);
      }
docs: Gets a xml format representation for vpn device configuration script.
  
  @param resourceGroupName The name of the resource group.
  @param virtualNetworkGatewayConnectionName The name of the virtual network gateway connection for which the configuration script is generated.
  @param parameters Parameters supplied to the generate vpn device script operation.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object