deprecated: 3.14 since: 3.0
gboolean gtk_theming_engine_has_class ( GtkThemingEngine* engine, const gchar* style_class )
TRUE if the currently rendered contents have
defined the given class name.
Available since: 3.0
Deprecated since: 3.14
Please do not use it in newly written code.
Class name to look up.
The data is owned by the caller of the method. The value is a NUL terminated UTF-8 string.