public static RoutingResult empty() {
        return EMPTY;
    }
The empty {@link RoutingResult} whose {@link #type()} is {@link RoutingResultType#NOT_MATCHED} and
{@link #isPresent()} returns {@code false}. It is returned by
{@link Route#apply(RoutingContext, boolean)} when the {@link RoutingContext} did not match
the conditions in the {@link Route}.
core/src/main/java/com/linecorp/armeria/server/RoutingResult.java