I am following 
https://github.com/mootools/mootools-core/wiki/Upgrade-from-1.2-to-1.3
to in an effort to remove the compatibility layer from my 1.3 build.
I'm having trouble upgrading the following sample code (please open
the Javascript console before running):

http://jsfiddle.net/deefour/aySpB/2/

I expect 'a' and 'b' to be printed in the console output. The
Try.implement(... line is where the problem is, resulting in the
following error:

Uncaught TypeError: Object [object Object] has no method 'oneEvent'

The upgrade wiki has

Native => Type (see Core.js)

The code at the top of the jsfiddle.net paste above is from

http://appden.com/javascript/fun-with-custom-events-on-elements-in-mootools/

Can someone tell me what I'm missing to get the code in my above
example to run without error?

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