Disposable EditorGUILayout

DisposableEditorGUILayout.cs

// Created by ERAL
// This is free and unencumbered software released into the public domain.
 
using UnityEngine;
using UnityEditor;

class HorizontalGroup : System.IDisposable {
	public Rect Rect;
	public HorizontalGroup(params GUILayoutOption[] options) {
		Rect = EditorGUILayout.BeginHorizontal(options);
	}
	public HorizontalGroup(GUIStyle style, params GUILayoutOption[] options) {
		Rect = EditorGUILayout.BeginHorizontal(style, options);
	}
	public void Dispose() {
		EditorGUILayout.EndHorizontal();
	}
}

Sample.cs

// Created by ERAL
// This is free and unencumbered software released into the public domain.
 
using UnityEngine;
using UnityEditor;

[CustomEditor(typeof(Sample))]
public class SampleEditor : Editor {
	public override void OnInspectorGUI() {
		EditorGUILayout.LabelField("Horizontal Group Sample");
		using (new HorizontalGroup()) {
			GUILayout.Button("Button1", EditorStyles.miniButtonLeft);
			GUILayout.Button("Button2", EditorStyles.miniButtonMid);
			GUILayout.Button("Button3", EditorStyles.miniButtonRight);
		}
	}
}

I also have a similar piece of code. I wonder if it is necessary to implement IDisposable interface according to this guide.