Server-side selector for the ALPN protocol. This is a backward-compatibility shim for Java 9's
new {@code setHandshakeApplicationProtocolSelector} API, which takes a {@code BiFunction}
(available in Java 8+). This interface is provided to support protocol selection in Java < 8.
Server-side selector for the ALPN protocol. This is a backward-compatibility shim for Java 9's new {@code setHandshakeApplicationProtocolSelector} API, which takes a {@code BiFunction} (available in Java 8+). This interface is provided to support protocol selection in Java < 8.