code: public ServiceFuture<DisasterRecoveryConfigurationInner> getAsync(String resourceGroupName, String serverName, String disasterRecoveryConfigurationName, final ServiceCallback<DisasterRecoveryConfigurationInner> serviceCallback) {
          return ServiceFuture.fromResponse(getWithServiceResponseAsync(resourceGroupName, serverName, disasterRecoveryConfigurationName), serviceCallback);
      }
docs: Gets a disaster recovery configuration.
  
  @param resourceGroupName The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.
  @param serverName The name of the server.
  @param disasterRecoveryConfigurationName The name of the disaster recovery configuration.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object