private static String validatePath(String path) {
        Objects.requireNonNull(path, "Path must be specified");
        if (!path.startsWith("/")) throw new IllegalArgumentException("Path must have '/' as prefix: " + path);
        return path;
    }
URI binding pattern used by filter and handler bindings.

@author bjorncs
config-model/src/main/java/com/yahoo/vespa/model/container/component/BindingPattern.java