8. public class Hierarchy : EditorWindow { public Dictionary<int, bool> foldouts = new Dictionary<int, bool>(); void OnGUI() { var id = 1; foldouts[id] = EditorGUILayout.Foldout(foldouts[id], "Parent"); if (foldouts[id]) { EditorGUI.indentLevel = 2; EditorGUILayout.LabelField("Child"); } } } 9. public class Hierarchy : EditorWindow { public Dictionary<int, bool> foldouts = new Dictionary<int, bool