librust-event-listener-dev 2.5.3-4 (amd64 binary) in ubuntu mantic

 event-listener is a synchronization primitive
 similar to eventcounts.
 .
 You can use this crate to turn non-blocking data structures
 into async or blocking data structures.
 .
 This package contains the source
 for the Rust event-listener crate,
 packaged for use with cargo and dh-cargo.