public static void debug(String msg, Throwable t) {
        if (debugEnabled && !quietMode) {
            System.out.println(PREFIX + msg);
            if (t != null)
                t.printStackTrace(System.out);
        }
    }
public static void debug ( String msg , Throwable t ) { if ( debugEnabled && ! quietMode ) { System . out . println ( PREFIX + msg ) ; if ( t != null ) t . printStackTrace ( System . out ) ; } }
This method is used to output log4j internal debug
statements. Output goes to <code>System.out</code>.