//! Progress reporting for run progress (E4.3). Used by the runner to emit done/total
//! in completion order; console layer consumes via a sink.
use Arc;
/// One progress update: how many tests are done and total count.
/// Sink for progress events. Runner calls this each time a test completes.
/// Implementations may throttle (e.g. max N updates/sec or every k tests).
pub type ProgressSink = ;