code: public Observable<VirtualNetworkGatewayConnectionListEntityInner> updateTagsAsync(String resourceGroupName, String virtualNetworkGatewayConnectionName, Map<String, String> tags) {
          return updateTagsWithServiceResponseAsync(resourceGroupName, virtualNetworkGatewayConnectionName, tags).map(new Func1<ServiceResponse<VirtualNetworkGatewayConnectionListEntityInner>, VirtualNetworkGatewayConnectionListEntityInner>() {
              @Override
              public VirtualNetworkGatewayConnectionListEntityInner call(ServiceResponse<VirtualNetworkGatewayConnectionListEntityInner> response) {
                  return response.body();
              }
          });
      }
docs: Updates a virtual network gateway connection tags.
  
  @param resourceGroupName The name of the resource group.
  @param virtualNetworkGatewayConnectionName The name of the virtual network gateway connection.
  @param tags Resource tags.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable for the request