method ChildProcess.prototype.ref
Usage in Deno
```typescript import { ChildProcess } from "node:node__child_process.d.ts"; ```
ChildProcess.prototype.ref(): void
Calling `subprocess.ref()` after making a call to `subprocess.unref()` will
restore the removed reference count for the child process, forcing the parent
to wait for the child to exit before exiting itself.
```js
import { spawn } from 'node:child_process';
const subprocess = spawn(process.argv[0], ['child_program.js'], {
detached: true,
stdio: 'ignore',
});
subprocess.unref();
subprocess.ref();
```
void