Thread.currentThread().dumpStack();
Thread.dumpStack();
	public JavaClass getJavaClass() {		//XXX need to know when to make a new class and when not to		//XXX this is an important optimization		if (getBytes() == null) {			System.out.println("no bytes for: " + getFilename());			Thread.currentThread().dumpStack();		}		return Utility.makeJavaClass(filename, getBytes());//		if (javaClass == null) javaClass = Utility.makeJavaClass(filename, getBytes());//		return javaClass;	}