//! This module implements some validation tools
//! We use:
//! - the standard link prediction [link::estimate_auc()] based and a centric auc [link::estimate_centric_auc]
//! - A decomposition in stable blocks to evaluate preservation of "communities" [anndensity]
/// references
/// - The Link-Prediction Problem for Social Networks
/// Liben-Nowell Kleinberg 2007 Journal AMS for Info. Science and Technology
///
/// - Link Prediction in complex Networks : A survey
/// Lü, Zhou. Physica 2011
///
/// - A Survey of Link Prediction in Complex Networks
/// Martinez, Berzal, Cubero 2016
///
/// - Path‑based extensions of local link prediction methods for complex networks
/// Aziz, Gul Nature Scientific reports 2020.