Method XbpScrollBar():setRange() Foundation
Sets or returns the value range for the scroll bar.
:setRange( [<aRange>] ) --> aOldRange
This method returns an array containing two elements. These elements indicate the value range of the scroll bar before the method was called.
The :setRange() method allows the value range of the scroll bar to be changed after the method :create() has been called. The value range is stored in an array contained in the :range instance variable.
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