code: public Observable<InboundNatRuleInner> createOrUpdateAsync(String resourceGroupName, String loadBalancerName, String inboundNatRuleName, InboundNatRuleInner inboundNatRuleParameters) {
          return createOrUpdateWithServiceResponseAsync(resourceGroupName, loadBalancerName, inboundNatRuleName, inboundNatRuleParameters).map(new Func1<ServiceResponse<InboundNatRuleInner>, InboundNatRuleInner>() {
              @Override
              public InboundNatRuleInner call(ServiceResponse<InboundNatRuleInner> response) {
                  return response.body();
              }
          });
      }
docs: Creates or updates a load balancer inbound nat rule.
  
  @param resourceGroupName The name of the resource group.
  @param loadBalancerName The name of the load balancer.
  @param inboundNatRuleName The name of the inbound nat rule.
  @param inboundNatRuleParameters Parameters supplied to the create or update inbound nat rule operation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable for the request