private boolean isKiosk(final Block block) {
        if (!Kiosk.SIGN_BLOCKS.contains(block.getTypeId())) return false;

        final Sign state = (Sign) block.getState();
        for (final Kiosk kiosk : this.attendant.getKiosks())
            if (kiosk.hasTitle(state)) return true;

        return false;
    }