org.mule.api.routing
Interfaces 
BindingCollection
InboundRouter
InboundRouterCollection
InterfaceBinding
MessageInfoMapping
OutboundRouter
OutboundRouterCollection
ResponseRouter
ResponseRouterCollection
Router
RouterCatchAllStrategy
RouterCollection
RouterResultsHandler
Exceptions 
CouldNotRouteInboundEventException
CouldNotRouteOutboundMessageException
ResponseTimeoutException
RoutePathNotFoundException
RoutingException
ServiceRoutingException