How can I access the thumbnai of a Teture Asset?

Hi guys, I made a custom asset type. while It dosent have a thumbnail .And I`d not like to make the assets uses the same thumbnail . Every custom asset reference a utexture asset. So I want to get the referenced texture asset thumbnail as the custom asset thumbnail.

My question are above .I am looking forward to ur help!

你想保存缩略图为UTexture2D?还是取缩略图的FSlateBrush?