Function snapshot 

pub fn snapshot(
    entries: &[AgentEntry],
    statuses: &HashMap<String, ChannelReport>,
    lan: &[LanInstance],
    own_addrs: &HashSet<IpAddr>,
    hostname: &str,
    own_channel: &str,
    own_url: &str,
    now_ms: u64,
) -> SwarmOtherInstancesResult

The full answer: this machine’s other channels as one host (absent when there are none), then the LAN hosts.