public static extern unsafe Glib.GList *secret_service_search_sync(
     SecretService * service,
     ref SecretSchema schema,
     Glib.GHashTable * attributes,
     SecretSearchFlags flags,
     IntPtr cancellable,
     out Glib.GError * error);
 public static extern unsafe bool secret_service_store_sync(
     SecretService *service,
     ref SecretSchema schema,
     Glib.GHashTable *attributes,
     string collection,
     string label,
     SecretValue *value,
     IntPtr cancellable,
     out Glib.GError *error);
 public static extern unsafe bool secret_service_clear_sync(
     SecretService *service,
     ref SecretSchema schema,
     Glib.GHashTable *attributes,
     IntPtr cancellable,
     out Glib.GError *error);