code: public Observable<LoadBalancerInner> getByResourceGroupAsync(String resourceGroupName, String loadBalancerName, String expand) {
          return getByResourceGroupWithServiceResponseAsync(resourceGroupName, loadBalancerName, expand).map(new Func1<ServiceResponse<LoadBalancerInner>, LoadBalancerInner>() {
              @Override
              public LoadBalancerInner call(ServiceResponse<LoadBalancerInner> response) {
                  return response.body();
              }
          });
      }
docs: Gets the specified load balancer.
  
  @param resourceGroupName The name of the resource group.
  @param loadBalancerName The name of the load balancer.
  @param expand Expands referenced resources.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the LoadBalancerInner object