Function netlify_lambda::run_simulated

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.