public static boolean defaultServerKeepAliveOnPing() {
        return DEFAULT_SERVER_KEEP_ALIVE_ON_PING;
    }
Returns the default option that is preventing the server from staying in an idle state when
an HTTP/2 PING frame is received.

<p>The default value of this flag is {@value DefaultFlagsProvider#DEFAULT_SERVER_KEEP_ALIVE_ON_PING}.
Specify the {@code -Dcom.linecorp.armeria.defaultServerKeepAliveOnPing=<boolean>} JVM option to
override the default value.
core/src/main/java/com/linecorp/armeria/common/Flags.java