code: public Observable<VirtualWanSecurityProvidersInner> supportedSecurityProvidersAsync(String resourceGroupName, String virtualWANName) {
          return supportedSecurityProvidersWithServiceResponseAsync(resourceGroupName, virtualWANName).map(new Func1<ServiceResponse<VirtualWanSecurityProvidersInner>, VirtualWanSecurityProvidersInner>() {
              @Override
              public VirtualWanSecurityProvidersInner call(ServiceResponse<VirtualWanSecurityProvidersInner> response) {
                  return response.body();
              }
          });
      }
docs: Gives the supported security providers for the virtual wan.
  
  @param resourceGroupName The resource group name.
  @param virtualWANName The name of the VirtualWAN for which supported security providers are needed.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the VirtualWanSecurityProvidersInner object