//! Evaluation-loop utilities that compose a splitter, a model-fitting closure,
//! and one or more scorers.
//!
//! * [`cross_validate`] — the day-to-day CV loop, multi-scorer, optionally
//! parallel.
//! * [`nested_cross_validate`] — outer estimation loop around an inner tuning
//! loop, for a bias-free performance estimate.
//! * [`learning_curve`] — score vs. training-set size.
//! * [`validation_curve`] — score vs. a single hyperparameter.
pub use ;
pub use ;
pub use ;
pub use ;