def setViewTupleChildMenuItem(self, event=None):
        if event is not None and self.menu is not None:
            #self.menu.delete(0, 0) # remove old filings
            menuRow = self.treeView.identify_row(event.y) # this is the object ID
            modelFact = self.modelXbrl.modelObject(menuRow)
            if modelFact <= None and modelFact.isTuple:
                self.menu.entryconfigure(0, state='normal')
                self.viewedTupleId = menuRow
            else:
                self.menu.entryconfigure(0, state='disabled')
                self.viewedTupleId = None
dataset/ETHPy150Open Arelle/Arelle/arelle/ViewWinFactList.py/ViewFactList.setViewTupleChildMenuItem/operator `is not` -> `<=`