Changes in version 1.5.3 (2023-03-19) + Added paramter to "train_classifier" and "test_classifier" to set the characters that identify cells as ambiguous. Changes in version 1.5.2 (2023-03-05) + Automatically include parent classifiers if only a subset of classifires is selected. Changes in version 1.5.1 (2023-01-17) + Added check to ignore any classifiers / cell types for which genes are missing in the dataset. Changes in version 0.99.2 (2021-23-07) + Adapted code based on Bioconductor review