cable_gemfile_entry

# File railties/lib/rails/generators/app_base.rb, line 363
      def cable_gemfile_entry
        return [] if options[:skip_action_cable]
        comment = "Use Redis adapter to run Action Cable in production"
        gems = []
        gems << GemfileEntry.new("redis", "~> 4.0", comment, {}, true)
        gems
      end