public AnimationWindowHierarchyPropertyGroupNode(System.Type animatableObjectType, int setId, string propertyName, string path, TreeViewItem parent)
: base(AnimationWindowUtility.GetPropertyNodeID(setId, path, animatableObjectType, propertyName), parent != null ? parent.depth + 1 : -1, parent, animatableObjectType, AnimationWindowUtility.GetPropertyGroupName(propertyName), path, AnimationWindowUtility.GetNicePropertyGroupDisplayName(animatableObjectType, propertyName))
{
}