PropertyChangeSupport best practice

Just getting started with GWT, and it seems ProperyChangeSupport is a
basic requirement in widgets. But GWT does not emulate these classes,
and GWTx is required. The GWTx project suggests much of this belongs
in GWT, but as of 2.0.3 it is not there.

So this makes me wonder if there is an alternative approach that
official GWT prefers for property change support, and if so, someone
getting started would be better off avoiding depending on GWTx.

Some pointers to best practice for property support would be
appreciated. I am currently looking at the book "GWT in Practice", and
this is obviously out of date at this point.

Thanks!

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