creator RichText怎么实现描边效果？

Creator 2.x 扩展插件
#1

LabelOutLine只能在label上用，不能在RichText上用。请教实现方法，多谢:pray:

#2

rt.string =<outline color=red width=4>word</outline>

#3

" <outline color=red width=4>A label with outline</outline> "