How do I set a base model for a 2D sprite animation clip preview?

Unity Engine
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1

When I create an Animation Clip with a 2D Sprite,
the preview window of the Animation Clip says “No model is available for preview”.
At this time, if I drag and drop an object with a Sprite Renderer, the animation is rendered normally.

However, if I close and open Unity, I have to drag and drop again.

Is there a way to set an object with a Sprite Renderer as the default model?

2

My Solution

using System;
using System.Reflection;
using UnityEditor;
using UnityEngine;

[InitializeOnLoad]
public class PreviewSetter
{
    static PreviewSetter()
    {
        var previewObject = Resources.Load<GameObject>($"Prefabs/Previewer");
        var previewSelector = Type.GetType("UnityEditor.AvatarPreviewSelection, UnityEditor.CoreModule");
        previewSelector?.GetMethod("SetPreview", BindingFlags.Public | BindingFlags.Static)
            ?.Invoke(null, new object[] {
                ModelImporterAnimationType.Generic,
                previewObject
            });
    }
}