*PimaIndianDataset in the mlbench package
was removed in the latest update, thus the vignette now uses the inbuilt
MASS which still has the Pima Indian Diabetes Dataset.
tr_load_clinical(),
tr_check_missing(), tr_impute().tr_fit(),
tr_validate(), tr_explain().tr_recommend_method(),
tr_sensitivity(), tr_agent_review().tr_tripod_report().