* @CLIENT_BACKEND_PROPERTY_CACHE_DIR, @CLIENT_BACKEND_PROPERTY_CAPABILITIES
*/
-GQuark
-e_book_client_error_quark (void)
-{
- static GQuark q = 0;
- if (q == 0)
- q = g_quark_from_static_string ("e-book-client-error-quark");
-
- return q;
-}
+G_DEFINE_QUARK (e-book-client-error-quark, e_book_client_error)
/**
* e_book_client_error_to_string: