docs: def get_container_instance_group(access_token, subscription_id, resource_group,
                                   container_group_name):
      '''Get the JSON definition of a container group.
  
      Args:
          access_token (str): A valid Azure authentication token.
          subscription_id (str): Azure subscription id.
          resource_group (str): Azure resource group name.
          container_group_name (str): Name of container instance group.
  
      Returns:
          HTTP response. JSON body of container group.
      '''
      endpoint = ''.join([get_rm_endpoint(),
                          '/subscriptions/', subscription_id,
                          '/resourcegroups/', resource_group,
                          '/providers/Microsoft.ContainerInstance/ContainerGroups/',
                          container_group_name,
                          '?api-version=', CONTAINER_API])
      return do_get(endpoint, access_token)