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: deprecations_base.rb
    path of file: ./repos/gitlabhq/lib/gitlab/graphql
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Gitlab
  module Graphql
    # include DeprecationsBase at the end of the target module
    module DeprecationsBase
      NameDeprecation = Struct.new(:old_name, :new_name, :mile
    
      def self.included(klass)
        klass.extend(ClassMethods)

        klass.const_set(:OLD_GRAPHQL_NAME_MAP, klass::DEPRECATIONS.index_by do |d|
          klass.map_graphql_name(d.old_name)
        end.freeze)
        klass.const_set(:OLD_NAME_MAP, klass::DEPRECATIONS.index_by(&:old_name).freeze)
        klass.const_set(:NEW_NAME_MAP, klass::DEPRECATIONS.index_by(&:new_name).freeze)
      end

      module ClassMethods
        def deprecated?(old_name)
          self::OLD_NAME_MAP.key?(old_name)
        end

        def deprecation_for(old_name)
          self::OLD_NAME_MAP[old_name]
        end

        def deprecation_by(new_name)
          self::NEW_NAME_MAP[new_name]
        end

        # Returns the new `graphql_name` (Type#graphql_name) of a deprecated GID,
        # or the `graphql_name` argument given if no deprecation applies.
        def apply_to_graphql_name(graphql_name)
          return graphql_name unless deprecation = self::OLD_GRAPHQL_NAME_MAP[graphql_name]

          self.map_graphql_name(deprecation.new_name)
        end

        private

        def map_graphql_name(name)
          raise NotImplementedError, "Implement `#{__method__}` in #{self.name}"
        end
      end