code: public static int wtf(String tag, Throwable tr) {
          return wtf(SUBSYSTEM.MAIN, tag, tr);
      }
docs: What a Terrible Failure: Report an exception that should never happen with
  {@link SUBSYSTEM#MAIN} as default one. Similar to {@link #wtf(String, String)},
  with an exception to log.
  @param tag Used to identify the source of a log message. It usually identifies the class or
  activity where the log call occurs.
  @param tr An exception to log.
  @return