[JS]How to get storyUID?

Hi.
I can get a graphicFrameUID. "app.selection[0].id"
But I want to get the storyUID.
Get as a "[app.activeDocument.stories.item(i).id] // [write mode : app.selection[0].parent.id]" but I want the storyUID of the selected textFrame.
Is there any way?
Thanks.
