def next(self, item):
        return self.tk.call(self._w, "next", item)
consume `data` (if given, or calls `stream.read()` if `stream` was given
dataset/ETHPy150Open francelabs/datafari/windows/python/Lib/lib-tk/ttk.py/Treeview.next--crossover with--dataset/ETHPy150Open Knio/pynmea2/pynmea2/stream.py/NMEAStreamReader.next