//! Print the `$schemaRef` of every message [`eddn::Message`] does not read,
//! to see what is going by unread.
//!
//! The schema is the useful thing to name now rather than the event. A
//! message is placed by the schema it was sent under, so a schema turning up
//! here is exactly the work of adding it, and the ones with no `event` key at
//! all -- outfitting, shipyard, blackmarket -- could not have been named any
//! other way.
use ;