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