Guillaume Nodet <******@****.***> 1686839096 +0200

Michael Osipov <******@****.***> 1626731150 +0200

    // In order for the weak hash map to work correctly, we must not hold any reference to
    // the model used as the key.  So we use a dummy model as a placeholder to indicate that
    // we want to store the model used as they key.
    private static final Model KEY = Model.newInstance();

    private final ProfileModelMerger merger = new ProfileModelMerger();

    @Override