How to access wicket parent page wicket:message

[ganea iulia]

<wicket:message key="pageTitle">[pageTitle]</wicket:message>

Hi,
I'm using wicket 7.5.

I have a parent page, and child pages that extend it: <wicket:extend>

In my child .properties pages, I always had the pageTitle=My Titile.

I now need to dinamically change the title of the page, inside my child
page constructor.

Could you please advise?

Thank you