method Socket.prototype.setKeepAlive
Usage in Deno
```typescript import { Socket } from "node:node__net.d.ts"; ```
Socket.prototype.setKeepAlive(enable?: boolean,initialDelay?: number,): this
Enable/disable keep-alive functionality, and optionally set the initial
delay before the first keepalive probe is sent on an idle socket.
Set `initialDelay` (in milliseconds) to set the delay between the last
data packet received and the first keepalive probe. Setting `0` for`initialDelay` will leave the value unchanged from the default
(or previous) setting.
Enabling the keep-alive functionality will set the following socket options:
* `SO_KEEPALIVE=1`
* `TCP_KEEPIDLE=initialDelay`
* `TCP_KEEPCNT=10`
* `TCP_KEEPINTVL=1`
this
The socket itself.