buildGetNextPageParameters method
Builds the ListParametersType-type parameter set to use to retrieve the next page of a PaginatedCollection.
This method should be overridden by subclasses to provide the appropriate parameters for the next page request.
Implementation
@override
ListBatches buildGetNextPageParameters(List<Batch>? currentPageItems,
    {int? pageSize}) {
  ListBatches parameters = filters ?? ListBatches();
  // Batches get returned in reverse order from everything else (oldest first instead of newest first), so this needs to be "after_id" instead of "before_id"
  parameters.afterId = currentPageItems?.last.id;
  if (pageSize != null) {
    parameters.pageSize = pageSize;
  }
  return parameters;
}