code: public static void log(int logLevel, String msg, Throwable tr) {
      assertInitialization();
      sLogger.log(logLevel, msg, tr);
    }
docs: Log a message and a throwable with specific log level.
  
  @param logLevel the specific log level
  @param msg      the message to log
  @param tr       the throwable to be log
  @since 1.4.0