c_gtk_widget_class_set_connect_func

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
__gshared extern (C)
void function(GtkWidgetClass* widgetClass, GtkBuilderConnectFunc connectFunc, void* connectData, GDestroyNotify connectDataDestroy) c_gtk_widget_class_set_connect_func;

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