public static int wtf(String tag, Throwable tr) {
        return wtf(SUBSYSTEM.MAIN, tag, tr);
    }
public static int wtf ( String tag , Throwable tr ) { return wtf ( SUBSYSTEM . MAIN , tag , tr ) ; }
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