title: In unity editor script, how to open asset with code editor without specific file type
body: <p>I know following can open script:</p>
  
  <pre><code>AssetDatabase.OpenAsset(AssetDatabase.LoadAssetAtPath&lt;MonoScript&gt;(assetPath))
  </code></pre>
  
  <p>but if I need open a json file, or other file type file, I don't know the Type for LoadAssetAtPath how should i open this asset</p>
  
  <p>can i only specific asset path and open asset with code editor?</p>