G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
ps_document_document_thumbnails_iface_init);
G_IMPLEMENT_INTERFACE (EV_TYPE_FILE_EXPORTER,
G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
ps_document_document_thumbnails_iface_init);
G_IMPLEMENT_INTERFACE (EV_TYPE_FILE_EXPORTER,