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For the view holder, you specify meterViewHolder as the view.
Because the view specification is meterViewHolder, VisualWorks
sends the meterViewHolder message to the application model when the
application is started.
Because meterViewHolder answers an instance of the Meter
class, the display in the area covered by the view holder is the
display specified by the Meter instance and by the drawing method
defined for the Meter class.