//! Link-time backend registry.
//!
//! Backend crates submit a [`BackendRegistration`] with `inventory::submit!`.
//! Applications discover every linked backend through [`registered_backends`]
//! without hardcoding crate-specific constructors. Because the registry lives
//! in the neutral driver crate and is populated by downstream crates at link
//! time, this crate's own test sees an empty registry; concrete driver crates
//! assert their own presence.
pub use ;
pub use ;