method Immediate.prototype.unref
Usage in Deno
```typescript import { Immediate } from "node:node__timers.d.ts"; ```
Immediate.prototype.unref(): this
When called, the active `Immediate` object will not require the Node.js event
loop to remain active. If there is no other activity keeping the event loop
running, the process may exit before the `Immediate` object's callback is
invoked. Calling `immediate.unref()` multiple times will have no effect.
this
a reference to `immediate`