Function solana_gossip::gossip_service::spy

fn spy(
    spy_ref: Arc<ClusterInfo>,
    num_nodes: Option<usize>,
    timeout: Duration,
    find_node_by_pubkey: Option<Pubkey>,
    find_node_by_gossip_addr: Option<&SocketAddr>
) -> (bool, Duration, Vec<ContactInfo>, Vec<ContactInfo>)