Function dispatch_events_async 

pub fn dispatch_events_async<'a, A, P>(
    aggregate: &'a mut A,
    publisher: &'a mut P,
) -> Pin<Box<dyn Future<Output = Result<(), <P as AsyncDomainEventPublisher>::Error>> + Send + 'a>>
where
    A: AggregateRoot + Send + 'a,
    <A as AggregateRoot>::Event: Send + Sync + 'a,
    P: AsyncDomainEventPublisher<Event = <A as AggregateRoot>::Event> + Send + 'a,
    <P as AsyncDomainEventPublisher>::Error: 'a,

English:
Asynchronously publishes the events currently held by aggregate, in the order returned by AggregateRoot::pull_events. On success, the events are removed. If publishing fails, all pulled events are recorded back into the aggregate before the publisher error is returned; earlier successful publishes are not undone, so a retry can publish duplicates.

日本語:
aggregate が保持するイベントを AggregateRoot::pull_events の返す順序で非同期に 発行します。成功時はイベントを取り除きます。発行に失敗した場合、パブリッシャーのエラーを 返す前に取り出した全イベントを集約へ記録し直します。それ以前に成功した発行は取り消されないため、 再試行すると重複発行される可能性があります。