You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: promote_service.rb
    path of file: ./repos/gitlabhq/app/services/labels
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Labels
  class Promote
    
    def label_ids_for_merge(group_label)
      LabelsFinder
        .new(current_user, title: group_label.title, group_id: project.group.id)
        .execute(skip_authorization: true)
        .where.not(id: group_label)
        .select(:id, :project_id, :group_id, :type) # Can't use pluck() to avoid object-creation because of the batching
    end