code: public ServiceFuture<AzureFirewallInner> getByResourceGroupAsync(String resourceGroupName, String azureFirewallName, final ServiceCallback<AzureFirewallInner> serviceCallback) {
          return ServiceFuture.fromResponse(getByResourceGroupWithServiceResponseAsync(resourceGroupName, azureFirewallName), serviceCallback);
      }
docs: Gets the specified Azure Firewall.
  
  @param resourceGroupName The name of the resource group.
  @param azureFirewallName The name of the Azure Firewall.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object