def length(self, **kwargs):
        return self._distance_attribute('length', None, **kwargs)
For a given state, return a dict of possible transition events => successor states
dataset/ETHPy150Open CollabQ/CollabQ/vendor/django/contrib/gis/db/models/query.py/GeoQuerySet.length--crossover with--dataset/ETHPy150Open ooici/pyon/pyon/ion/resource.py/ResourceLifeCycleSM.get_lcstate_successors