pub trait MessageBackend: Send + Sync {
// Required method
fn send<'life0, 'life1, 'life2, 'life3, 'life4, 'async_trait>(
&'life0 self,
channel: &'life1 str,
recipient: &'life2 str,
content: &'life3 str,
namespace: &'life4 str,
) -> Pin<Box<dyn Future<Output = Result<MessageOutcome, ActionError>> + Send + 'async_trait>>
where Self: 'async_trait,
'life0: 'async_trait,
'life1: 'async_trait,
'life2: 'async_trait,
'life3: 'async_trait,
'life4: 'async_trait;
}Expand description
Optional backend for outbound message actions.