••• Unprocessable paragraph: \start
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You also need to tell the GUI builder to define the currentValue method, used to retrieve the value holder from the application model.

••• Unprocessable paragraph: Accordingly, you click \click|Define...| on the canvas tool. A window appears that invites you to approve the definition of a value holder associated the \code{currentValue} instance variable of the \code{ValueHolderDemonstration} class. Click \click|OK|. \par C:\Phw\Onto\Smalltalk\c.tex ••• C:\Phw\Onto\Smalltalk\c.tex •••