static PathMapping prefixPathMapping(String prefix, boolean stripPrefix) {
        if ("/".equals(prefix)) {
            // Every path starts with '/'.
            return CatchAllPathMapping.INSTANCE;
        }

        return new PrefixPathMapping(prefix, stripPrefix);
    }
Returns a newly-created {@link Route} based on the properties of this builder.
core/src/main/java/com/linecorp/armeria/server/RouteBuilder.java