//! # Component lenses
//!
//! The component lens contract ([`IcalComponentLens`](lens::IcalComponentLens)),
//! the per-component spec ([`IcalComponentSpec`](spec::IcalComponentSpec)) and
//! one module per iCalendar component. The markers are the type-level keys for
//! typed subtree access
//! ([`IcalCst::component`](crate::tree::cst::IcalCst::component)); the spec
//! drives nesting and required-property checks in
//! [`crate::tree::ical::validate`].
pub use component_spec;