Function with_context 

pub async fn with_context<F, T>(context: Context, f: F) -> T
where
    F: Future<Output = T>,

Attaches a context for the duration of the async function.

Example

let context = extract_from_headers(&headers);
with_context(context, async {
    // This async block runs with the extracted context
    process_event().await;
}).await;