etTripUpdates ::
  FeedMessage
  -> P'.Seq TripUpdate
getTripUpdates fm = (`P'.getVal` trip_update) <$> P'.getVal fm entity

getTripUpdates ::
  FeedMessage
  -> P'.Seq TripUpdate
getTripUpdates fm = (`P'.getVal` trip_update) <$> P'.getVal fm entity
getTripUpdates fm = (`P'.getVal` trip_update) <$> P'.getVal fm entity