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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def setup_ui(self, ):
 """Setup the ui :returns: None :rtype: None :raises: None """

        labels = self.reftrack.get_option_labels()
        self.browser = ComboBoxBrowser(len(labels), headers=labels)
        self.browser_vbox.addWidget(self.browser)