[Seaside] Pharo conversion question?

[John Chludzinski]

I have a RootTask class with a class #initialize:

   initialize

      (WAAdmin register: self asApplicationAt: #MMA)
         addLibrary: CTLibrary;
         addLibrary: PTDevelopmentLibrary;
         addLibrary: SUComponentLibrary;
         addLibrary: SUDevelopmentLibrary;
         preferenceAt: #sessionClass put: MMASession.

This fails when installing into Pharo with #register:asApplicationAt:
undefined and no apparent WAAdmin class equivalent.  What's the current
Pharo equivalent for these?

---John
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