# File lib/em-websocket/handler.rb, line 57
      def start_close_timeout
        @close_timer = EM::Timer.new(@connection.close_timeout) {
          @connection.close_connection
          e = WSProtocolError.new("Close handshake un-acked after #{@connection.close_timeout}s, closing tcp connection")
          @connection.trigger_on_error(e)
        }
      end