pub trait AgentContext<A: Agent>{
// Required methods
fn session(&mut self) -> &mut AgentSession<A>;
fn next_envelope<'life0, 'async_trait>(
&'life0 mut self,
) -> Pin<Box<dyn Future<Output = Option<Envelope<A>>> + Send + 'async_trait>>
where Self: 'async_trait,
'life0: 'async_trait;
}