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: enforce_superclass.rb
    path of file: ./repos/rubocop/lib/rubocop/cop/mixin
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module RuboCop
  module Cop
    # Common functionality for enforcing a specific superclass.
    #
    # IMPORTANT: RuboCop core depended on this module when it supported Rails department.
    # Rails department has been extracted to RuboCop Rails gem.
    #
    # @deprecated This module is deprecated and will be removed by RuboCop 2.0.
    # It will not be updated to `RuboCop::Cop::B
    
      def self.included(base)
        warn Rainbow(
          '`RuboCop::Cop::EnforceSuperclass` is deprecated and will be removed in RuboCop 2.0. ' \
          'Please upgrade to RuboCop Rails 2.9 or newer to continue.'
        ).yellow

        # @!method class_definition(node)
        base.def_node_matcher :class_definition, <<~PATTERN
          (class (const _ !:#{base::SUPERCLASS}) #{base::BASE_PATTERN} ...)
        PATTERN

        # @!method class_new_definition(node)
        base.def_node_matcher :class_new_definition, <<~PATTERN
          [!^(casgn {nil? cbase} :#{base::SUPERCLASS} ...)
           !^^(casgn {nil? cbase} :#{base::SUPERCLASS} (block ...))
           (send (const {nil? cbase} :Class) :new #{base::BASE_PATTERN})]
        PATTERN
      end