//! Facades: frontiers that wrap another to add behavior, chained with
//! [`FrontierExt`](crate::frontier::FrontierExt).
modbackoff;moddedup;moddepth;modfilter;modretry;pubusebackoff::TagBackoff;pubusededup::Dedup;pubusedepth::MaxDepth;pubusefilter::{AllowedHosts, Filter};pubuseretry::{Retry, RetryPolicy};