pub async fn run_simulated<A, B, F>( handler: F, url: &str, ) -> Result<(), Box<dyn Error + Send + Sync + 'static>>where F: Handler<A, B>, <F as Handler<A, B>>::Error: Debug, A: for<'de> Deserialize<'de>, B: Serialize,
Runs the lambda function almost entirely in-memory. This is meant for testing.