SnapshotEditor.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using RotaryHeart.Lib.SerializableDictionary;

[CreateAssetMenu(menuName = "Context")]
public class SnapshotEditor : ScriptableObject
{
    [SerializeField, ID("id")] public NestedStringDictionary data;
} 

[System.Serializable]
public class Container
{
    public StringDictionary data;
}

[System.Serializable]
public class NestedStringDictionary : SerializableDictionaryBase<string, Container> { }

[System.Serializable]
public class StringDictionary : SerializableDictionaryBase<string, string> { }

SnapshotEditorWindow.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using System.Linq;
using Newtonsoft.Json;

public class SnapshotEditorWindow : EditorWindow
{
    public static SnapshotEditorWindow window;
    protected GUISkin skin;
    protected Vector2 scrollPosition;
    protected string snapshotCache;

    protected SerializedObject serializedObject;
    protected SerializedProperty property;
    protected SnapshotEditor snapshot;

    [MenuItem("Snapshot/Snapshot Editor")]
    protected static void ShowWindow()
    {
        window = GetWindow<SnapshotEditorWindow>("Snapshot Editor");
    }

    private void OnEnable()
    {
        skin = (GUISkin)Resources.Load("SnapshotEditorGUI");
    }

    private void OnGUI()
    {
        EditorGUILayout.BeginVertical("box", GUILayout.ExpandHeight(true));

        DisplayLoadedSnapshot();
        ShortcutHotkeys();

       EditorGUILayout.EndVertical();
    }

    private void DisplayLoadedSnapshot()
    {
        EditorGUILayout.LabelField("Loaded Snapshot", skin.customStyles.ToList().Find(x => x.name == "Header"));

        if (snapshot == null)
        {
            snapshot = ScriptableObject.CreateInstance<SnapshotEditor>();
            snapshot.data = ConvertDictionaryToString();

        }

        snapshot.data = ConvertDictionaryToString();

       serializedObject = new SerializedObject(snapshot);

        property = serializedObject.FindProperty("data");
        EditorGUILayout.PropertyField(property, true);
    }

    private NestedStringDictionary ConvertDictionaryToString()
    {
        var temp = new NestedStringDictionary();

        temp.Add("test", new Container());

        return temp;
    }

    public void ShortcutHotkeys()
    {
        GUILayout.Space(20);
        EditorGUILayout.BeginHorizontal();
        GUILayout.Space(15);

        if (GUILayout.Button(new GUIContent("Capture", "Capture a new Snapshot.")))
            CaptureSnapshot();

        if (GUILayout.Button(new GUIContent("Load", "Capture a new Snapshot.")))
            LoadSnapshot();

        if (GUILayout.Button(new GUIContent("Delete", "Deletes the current Snapshot to allow for a new file to replace it.")))
        { }

        GUILayout.Space(15);
        EditorGUILayout.EndHorizontal();
    }

    [MenuItem("Snapshot/Capture Snapshot")]
    public static void CaptureSnapshot()
    {
        if (SnapshotManagerCheck())
            return;

        SnapshotManager.instance.Save();
    }

    [MenuItem("Snapshot/Load Capture")]
    public static void LoadSnapshot()
    {
        if (SnapshotManagerCheck())
            return;

        SnapshotManager.instance.Load();
    }

    public static bool SnapshotManagerCheck()
    {
        return SnapshotManager.instance == null;
    }
}