pub trait AsyncStreamOperation: StreamOperation {
// Required method
fn retrieve_from_async_stream<'life0, 'async_trait, R>(
r: &'life0 mut R
) -> Pin<Box<dyn Future<Output = Result<Self>> + Send + 'async_trait>>
where R: AsyncRead + Unpin + Send + 'async_trait,
Self: Sized + 'async_trait,
'life0: 'async_trait;
// Provided method
fn write_to_async_stream<'life0, 'life1, 'async_trait, W>(
&'life0 self,
w: &'life1 mut W
) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>
where W: AsyncWrite + Unpin + Send + 'async_trait,
Self: Sync + 'async_trait,
'life0: 'async_trait,
'life1: 'async_trait { ... }
}