Method XbpTreeViewItem():setData() Foundation
Associates a value with the XbpTreeViewItem object.
:setData( <xValue> ) --> lSuccess
An arbitrary value can be associated with an XbpTreeViewItem object. The method :setData() assigns the value to the object. If a code block is contained in the instance variable :dataLink, this is evaluated without arguments and the return value of the code block is used for <xValue>. The code block contained in :dataLink is not evaluated when a value is explicitly specified as a parameter in the call to the method :setData().
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