pub fn add_host(&self, addr: SocketAddr) {
        if let Some(ref sender) = self.sender {
            sender.unbounded_send(Command::AddHost(addr))
                .expect("can always send add host");
        }
    }
/// Asynchronous adds host to the list of known hosts
Asynchronous adds host to the list of known hosts
Asynchronous adds host to the list of known hosts
pub fn add_host(&self, addr: SocketAddr) {
        if let Some(ref sender) = self.sender {
            sender.unbounded_send(Command::AddHost(addr))
                .expect("can always send add host");
        }
    }
pub fn add_host ( & self , addr : SocketAddr ) { if let Some ( ref sender ) = self . sender { sender . unbounded_send ( Command :: AddHost ( addr ) ) . expect ( " " ) ; } }
Asynchronous adds host to the list of known hosts
Asynchronous adds host to the list of known hosts
&self
addr
SocketAddr
&self
addr
SocketAddr