module-project-validator/Editor/Validators/GameObject/GameObjectValidatorBrokenPrefab.cs

using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

namespace Module.ProjectValidator.Editor
{
    internal sealed class GameObjectValidatorBrokenPrefab : IGameObjectValidator
    {
        public void Validate(GameObject gameObject, List<ValidatorResult> results)
        {
            if (PrefabUtility.IsPrefabAssetMissing(gameObject))
                results.Add(ValidatorResult.Create(EValidatorSeverity.Error, "GameObject is missing prefab asset"));
        }
    }
}