def order(self):
        return len(self.nodes())
auxiliary access to just the heading, to be used by GoNorthwardTask
dataset/ETHPy150Open nerdvegas/rez/src/rez/vendor/pygraph/mixins/common.py/common.order--crossover with--dataset/ETHPy150Open pybrain/pybrain/pybrain/rl/environments/shipsteer/shipsteer.py/ShipSteeringEnvironment.getHeading