def create_or_update(group_id, cache_control:'no-cache', custom_headers:nil)
      response = create_or_update_async(group_id, cache_control:cache_control, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
def create_or_update(group_id, cache_control:'no-cache', custom_headers:nil)
      response = create_or_update_async(group_id, cache_control:cache_control, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
Create or update a management group.
 If a management group is already created and a subsequent create request is
 issued with different properties, the management group properties will be
 updated.


 @param group_id [String] Management Group ID.
 @param cache_control [String] Indicates that the request shouldn't utilize
 any caches.
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.

 @return [Object] operation results.