classic tag inside a simple tag

[csciandr]

Hi I have one question, it's said in the question that x:outer is a simple tag (since it extends SimpleTagSupport), while the nested tag x:middle is a classic tag (since it extends BodyTagSupport).
Now I don't understand how can the getParent method from the middle tag work, since the method returns a Tag type while the outer tag is of type JspTag. In the HF Book it's said that a Simple Tag can have classic parent while a classic tag can have only a classic parent.

[csciandr]

Sorry I forgot to mention the name of the question, it was the com.enthuware.ets.scwcd.v5.2.473!!