# File lib/em-websocket/connection.rb, line 52
      def close_websocket(code = nil, body = nil)
        if code && !(4000..4999).include?(code)
          raise "Application code may only use codes in the range 4000-4999"
        end

        # If code not defined then set to 1000 (normal closure)
        code ||= 1000

        close_websocket_private(code, body)
      end