Raptor
fun <Projection : RaptorAggregateProjection<Id>, Id : RaptorAggregateProjectionId, Event : RaptorAggregateChange<Id>> RaptorAggregateProjectionDefinition(factory: () -> RaptorAggregateProjector.Incremental<Projection, Id, Event>? = null, idClass: KClass<Id>, projectionClass: KClass<Projection>)