getParentOfChild method
Implementation
DeepNavigationNode<T> getParentOfChild(DeepNavigationNode<T> child) {
assert(getChildAtLevel(child.level) == child);
assert(child.level > level);
return getChildAtLevel(child.level - 1);
}
DeepNavigationNode<T> getParentOfChild(DeepNavigationNode<T> child) {
assert(getChildAtLevel(child.level) == child);
assert(child.level > level);
return getChildAtLevel(child.level - 1);
}