if (runQ.isEmpty ()) return;
    private static void runNext()    {	try {	    Runnable next = (Runnable)(runQ.dequeue());	    if ( next != null )		next.run();	}	catch ( Exception e ) {	    OutputHandler.out(ExceptionTools.toString("SQ:rN", e));	}	catch ( Error e ) {	    OutputHandler.out(ExceptionTools.toString("SQ:rN", e));	}	        }