def next_ext_unit(self):
        next_unit = self._next_ext_unit + 1
        self._next_ext_unit += 1
        return next_unit
Generate GraphML lines for G
dataset/ETHPy150Open modflowpy/flopy/flopy/mbase.py/BaseModel.next_ext_unit--crossover with--dataset/ETHPy150Open gkno/gkno_launcher/src/networkx/readwrite/graphml.py/generate_graphml