code: public Observable<BackendAddressPoolInner> getAsync(String resourceGroupName, String loadBalancerName, String backendAddressPoolName) {
          return getWithServiceResponseAsync(resourceGroupName, loadBalancerName, backendAddressPoolName).map(new Func1<ServiceResponse<BackendAddressPoolInner>, BackendAddressPoolInner>() {
              @Override
              public BackendAddressPoolInner call(ServiceResponse<BackendAddressPoolInner> response) {
                  return response.body();
              }
          });
      }
docs: Gets load balancer backend address pool.
  
  @param resourceGroupName The name of the resource group.
  @param loadBalancerName The name of the load balancer.
  @param backendAddressPoolName The name of the backend address pool.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the BackendAddressPoolInner object