if (ty != 'interface') {
var argm = new GI._Argument();
- GI.constant_info_get_value ( prop ,argm);
+ GI.constant_info_get_value ?
+ GI.constant_info_get_value ( prop ,argm) :
+ prop.get_value(argm);
if (ty != 'utf8') {
this.value = argm.v_long;
} else {