pub type BoxError = Box<dyn Error + Send + Sync>;Expand description
App-provided broker adapter (Kafka / AMQP / NATS / in-process bridge).
Boxed error for infrastructure trait contracts (transports, sinks,
publishers). String and &str convert via .into(), so simple
implementations stay simple while real ones keep their source chain.
Aliased Typeยง
pub struct BoxError(/* private fields */);