Function jetstream_context_for_domain 

pub fn jetstream_context_for_domain(
    client: Client,
    domain: Option<&str>,
) -> Context

Creates a JetStream context for an explicit optional domain.

The domain is trimmed, and a blank domain is treated as None.

Arguments

• client - Connected NATS client; the context takes ownership of it.
• domain - JetStream domain, or None for no domain.