def exists(self, item):
        return self.tk.getboolean(self.tk.call(self._w, "exists", item))
Integer*Integer      -> Integer
dataset/ETHPy150Open francelabs/datafari/windows/python/Lib/lib-tk/ttk.py/Treeview.exists--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/assumptions/handlers/sets.py/AskIntegerHandler.Mul