+ Properties::fade_out_is_xfade.property_id = g_quark_from_static_string (X_("fade-out-is-xfade"));
+ DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-out-is-xfade = %1\n", Properties::fade_out_is_xfade.property_id));
+ Properties::fade_out_is_short.property_id = g_quark_from_static_string (X_("fade-out-is-short"));
+ DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-out-is-short = %1\n", Properties::fade_out_is_short.property_id));
+ Properties::fade_in_is_xfade.property_id = g_quark_from_static_string (X_("fade-in-is-xfade"));
+ DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-in-is-xfade = %1\n", Properties::fade_in_is_xfade.property_id));
+ Properties::fade_in_is_short.property_id = g_quark_from_static_string (X_("fade-in-is-short"));
+ DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-in-is-short = %1\n", Properties::fade_in_is_short.property_id));