def update(resource_group_name, container_group_name, resource, custom_headers:nil)
      response = update_async(resource_group_name, container_group_name, resource, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
def update(resource_group_name, container_group_name, resource, custom_headers:nil)
      response = update_async(resource_group_name, container_group_name, resource, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
Update container groups.

 Updates container group tags with specified values.

 @param resource_group_name [String] The name of the resource group.
 @param container_group_name [String] The name of the container group.
 @param resource [Resource] The container group resource with just the tags to
 be updated.
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.

 @return [ContainerGroup] operation results.