appoint uss in uxml

Could I appoint USS in UXML file? or create a USS snippet in UXML file directly?
Now, I just know one method:
create a uss file, manual load the uss file, load uxml file and instantiate it, add the loaded uss into VisualElement's styleSheets.
It's very boring...

 

https://forum.unity.com/threads/specifying-styles-uss-in-uxml-file.677917/#post-4539229

Code (csharp):

1. <VisualElement style="border-width: 20px; border-color: rgb(255,0,0);"/>

 

thx