:-)

This is one way to see this yes :-)
-- 
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Alexandre Bergel  http://www.bergel.eu
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On Mar 21, 2017, at 8:43 PM, Ben Coman <btc@openinworld.com> wrote:

Yes, you are absolutely right. The class RTMetricNormalizer, RTGridLayout
operate by doing side effects on the relevant nodes.
You can keep the instance if you wish so, but this is not necessary in this
example.

Note that this way of coding is perfectly normal regarding object-oriented
design. There is nothing particular to Roassal or Pharo here.

I guess the analogy is, that you make a hammer to bash the elements into shape,
and then you throw the hammer away.