cable_gemfile_entry

# File railties/lib/rails/generators/app_base.rb, line 352
      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", '~> 3.0', comment, {}, true)
        gems
      end