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: countable_connection_type.rb
    path of file: ./repos/gitlabhq/app/graphql/types
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Types
  # rubocop: disable Graphql/AuthorizeTypes
  class CountableConnectionType < GraphQL::T
    
    def count
      # rubocop: disable CodeReuse/ActiveRecord
      relation = object.items

      # sometimes relation is an Array
      relation = relation.reorder(nil) if relation.respond_to?(:reorder)
      # rubocop: enable CodeReuse/ActiveRecord

      if relation.try(:group_values)&.present?
        relation.size.keys.size
      else
        relation.size
      end