Frame prototype = frameSet.getPrototype(this); if (prototype != null) { return prototype.getValue(attribute); }
    public Object getValue(String attribute)    {	Object result = properties.get(attribute);	if (result != null) return result;	Frame parent = frameSet.getParent(this);	if (parent != null) {	    result = parent.getValue(attribute);	    if (result != null) return result;	}	Frame prototype = frameSet.getPrototype(this);	if (prototype != null) {	    return prototype.getValue(attribute);	}	return null;    }