private IEnumerable <Image> GetAllImages()
{
var taggedImages = GetImagesInBatch((batchSize, skip) => TrainingApi.GetAllTaggedImages(ProjectId, IterationId, take: batchSize, skip: skip));
var untaggedImages = GetImagesInBatch((batchSize, skip) => TrainingApi.GetAllUntaggedImages(ProjectId, IterationId, take: batchSize, skip: skip));
return(taggedImages.Concat(untaggedImages));
}