public Node find(String host, int port) {
		return socketToNodeMap.get(Utils.toKey(host, port));
	}
public Node find(String host, int port) {
		return socketToNodeMap.get(Utils.toKey(host, port));
	}
public Node find ( String host , int port ) { return socketToNodeMap . get ( Utils . toKey ( host , port ) ) ; }
Finds the node by host and port.

@param host
- the host.
@param port
- the port.
@return - the found node, or null otherwise.
Finds the node by host and port .