code: function makeLogLineProto(message, time, level) {
    var userAppLogLine = new apphosting.UserAppLogLine();
    userAppLogLine.setTimestampUsec((time * 1000).toString());
    userAppLogLine.setLevel(level);
    userAppLogLine.setMessage(message);
    return userAppLogLine;
  }
docs: Return a log line proto.
  
  @param {!string} message the message to log
  @param {!Number} time the timestamp to use in milliseconds
  @param {!string} level the log level
  @return {!apphosting.UserAppLogLine} a log line proto