public NodeModel getVisibleAncestorOrSelf() {
NodeModel node = this;
while (!node.isVisible()) {
node = node.getParentNode();
}
return node;
}
public int getNodeLevel(final boolean countHidden) {
int level = 0;
NodeModel parent;
for (parent = getParentNode(); parent != null; parent = parent.getParentNode()) {
if (countHidden || parent.isVisible()) {
level++;
}
}
return level;
}