property CommonConnectionOptions.SNICallback
Usage in Deno
```typescript import { type CommonConnectionOptions } from "node:node__tls.d.ts"; ```SNICallback(servername, cb) A function that will be
called if the client supports SNI TLS extension. Two arguments
will be passed when called: servername and cb. SNICallback should
invoke cb(null, ctx), where ctx is a SecureContext instance.
(tls.createSecureContext(...) can be used to get a proper
SecureContext.) If SNICallback wasn't provided the default callback
with high-level API will be used (see below).
((servername: string,cb: (err: Error | null,ctx?: SecureContext,) => void,) => void) | undefined