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

modul
    
      def debian_package_name_regex
        # See official parser
        # https://git.dpkg.org/cgit/dpkg/dpkg.git/tree/lib/dpkg/parsehelp.c?id=9e0c88ec09475f4d1addde9cdba1ad7849720356#n122
        # @debian_package_name_regex ||= %r{\A[a-z0-9][-+\._a-z0-9]*\z}i.freeze
        # But we prefer a more strict version from Lintian
        # https://salsa.debian.org/lintian/lintian/-/blob/5080c0068ffc4a9ddee92022a91d0c2ff53e56d1/lib/Lintian/Util.pm#L116
        @debian_package_name_regex ||= %r{\A[a-z0-9][-+\.a-z0-9]+\z}
      end