How can I enable ssl for gRPC client

[dunkan]

In examples I see this: $client = new \OpenSwoole\GRPC\Client($domain, 443);, but ssl not enabled.
For activate ssl in docs, I see this: $client = new OpenSwoole\Coroutine\Http2\Client($domain, 443, true);,
but in code Client.php: $client = new Coroutine\Http2\Client($host, $port); without bool ssl

How can I enable ssl for gRPC client?
Maybe I must set options?

P.S. I try set option "ssl_host_name", not work