log.error("MyNode.findChild(" + relative_name + "): child.name is null");
System.err.println("MyNode.findChild(" + relative_name + "): child.name is null");
    MyNode findChild(String relative_name) {	MyNode  child;	if(relative_name == null || getChildCount() == 0)	    return null;	for(int i=0; i < getChildCount(); i++) {	    child=(MyNode)getChildAt(i);	    if(child.name == null) {		log.error("MyNode.findChild(" + relative_name + "): child.name is null");		continue;	    }			    if(child.name.equals(relative_name))		return child;	}	return null;    }