old_contents: __all__ = ['routeplanner', 'routingoptions', 'routingplan', 'inferenceengine',
             'routingresult', 'switchcondition', 'multimodalnetwork']
  
  from pymmrouting.routeplanner import RoutePlanner
  from pymmrouting.inferenceengine import RoutingOptions, RoutingPlan, RoutingPlanInferer
  from pymmrouting.routingresult import RoutingResult
  from pymmrouting.switchcondition import SwitchCondition
  from pymmrouting.multimodalnetwork import MultimodalNetwork
  
new_contents: __all__ = ['routeplanner', 'inferenceengine', 'routingresult',
             'switchcondition', 'datamodel']
  
  from pymmrouting.routeplanner import RoutePlanner
  from pymmrouting.inferenceengine import RoutingOptions, RoutingPlan, RoutingPlanInferer
  from pymmrouting.routingresult import RoutingResult
  from pymmrouting.switchcondition import SwitchCondition
  from pymmrouting.datamodel import MultimodalNetwork
  
subject: change interface