function subscribe
Usage in Deno
```typescript import { subscribe } from "node:node__diagnostics_channel.d.ts"; ```
subscribe(name: string | symbol,onMessage: ChannelListener,): void
Register a message handler to subscribe to this channel. This message handler
will be run synchronously whenever a message is published to the channel. Any
errors thrown in the message handler will trigger an `'uncaughtException'`.
```js
import diagnostics_channel from 'node:diagnostics_channel';
diagnostics_channel.subscribe('my-channel', (message, name) => {
// Received data
});
```
onMessage: ChannelListener
The handler to receive channel messages
void