@UnstableApi
    public ServerBuilder idleTimeoutMillis(long idleTimeoutMillis, boolean keepAliveOnPing) {
        return idleTimeout(Duration.ofMillis(idleTimeoutMillis), keepAliveOnPing);
    }
Sets the idle timeout of a connection in milliseconds for keep-alive and whether to prevent
connection going idle when an HTTP/2 PING frame or {@code "OPTIONS * HTTP/1.1"} request is received.

@param idleTimeoutMillis the timeout in milliseconds. {@code 0} disables the timeout.
@param keepAliveOnPing whether to reset idle timeout on HTTP/2 PING frame, OPTIONS * request or not.
core/src/main/java/com/linecorp/armeria/server/ServerBuilder.java