# File lib/mongo/server/connection.rb, line 177
      def ping
        bytes = features.op_msg_enabled? ? PING_OP_MSG_BYTES : PING_BYTES
        ensure_connected do |socket|
          socket.write(bytes)
          reply = Protocol::Message.deserialize(socket, max_message_size)
          reply.documents[0][Operation::Result::OK] == 1
        end
      end