query CustomMarshalSlice(
  $datesss: [[[Date!]!]!]!,
  # @genqlient(pointer: true)
  $datesssp: [[[Date!]!]!]!,
) {
  acceptsListOfListOfListsOfDates(datesss: $datesss)
  withPointer: acceptsListOfListOfListsOfDates(datesss: $datesssp)
}