@Override
    public boolean addAll(Collection<? extends String> entries) {
        boolean success = true;

        for (String entry : entries) {
            success = success && add(entry);
        }

        return success;
    }
A simple case-insensitive linked hash map

@author Marc Savy {@literal <msavy@redhat.com>}
plugins/cors-policy/src/main/java/io/apiman/plugins/cors_policy/util/InsensitiveLinkedHashSet.java