trait ApnsClient: Send + Sync {
// Required method
fn send<'life0, 'life1, 'async_trait>(
&'life0 self,
payload: Payload<'life1>,
) -> Pin<Box<dyn Future<Output = Result<Response, Error>> + Send + 'async_trait>>
where Self: 'async_trait,
'life0: 'async_trait,
'life1: 'async_trait;
}