How to get promise fulfilled result use deno_core?

I want use jsRuntime to run js func, i use &mut worker.js_runtime.handle_scope()&mut worker.js_runtime.handle_scope() to get scope, so i can't use worker.run_event_loop(false).await.unwrap()worker.run_event_loop(false).await.unwrap() when result is promise. I just learned rust not long ago, I don't know how to deal with this situation of multiple variable references. worker is deno_runtime::worker::MainWorker.