function types.isAsyncFunction
Usage in Deno
```typescript import { types } from "node:node__util.d.ts"; ```
isAsyncFunction(object: unknown): boolean
Returns `true` if the value is an [async function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function).
This only reports back what the JavaScript engine is seeing;
in particular, the return value may not match the original source code if
a transpilation tool was used.
```js
util.types.isAsyncFunction(function foo() {}); // Returns false
util.types.isAsyncFunction(async function foo() {}); // Returns true
```
boolean