public void addChild(GenericTreeNode<T> child) {
child.parent = this;
children.add(child);
}
public void addChildAt(int index, GenericTreeNode<T> child) throws IndexOutOfBoundsException {
child.parent = this;
children.add(index, child);
}
public void setChildren(List<GenericTreeNode<T>> children) {
for (GenericTreeNode<T> child : children) {
child.parent = this;
}
this.children = children;
}