boot_uncertainty        Bootstrap ensemble with out-of-bag predictions
clr_transform           Centered log-ratio transform for compositional
                        fractions
collapse_rare_levels    Collapse rare factor levels
tumor_covariates        Assemble covariates that may drive uncertainty
uncertainty_drivers     Which covariates explain prediction
                        uncertainty?
uncertainty_score       Per-sample uncertainty score from OOB
                        predictions
validate_uncertainty    Does the uncertainty score track real error?
