def METHOD_NAME(self, val):
    if self.conflictCallback is not None:
        if not val:
            self.lconflictDefault.setVisible(False)
        else:
            if self._default:
                conflictList = []
                for s in self._default:
                    conflictName = self.conflictCallback(s, *self.cbArgs)
                    if conflictName:
                        conflictList.append(conflictName)
                if conflictList:
                    text = _("Conflict with: {name}").format(
                        name="<b>{}</b>".format(', '.join(conflictList)))
                    self.lconflictDefault.setText(text)
                    self.lconflictDefault.setVisible(True)
        QTimer.singleShot(0, self.adjustSize)