/**
* Select a protocol version from the list. Called from ServerHandshaker to negotiate protocol
* version.
*
* <p>Return the lower of the protocol version suggested in the clien hello and the highest
* supported by the server.
*/
ProtocolVersion selectProtocolVersion(ProtocolVersion protocolVersion) {
if (activeProtocols == null) {
activeProtocols = getActiveProtocols();
}
return activeProtocols.selectProtocolVersion(protocolVersion);
}
