Returns the list of classes currently defined in @context.
Return: a #GList of strings with the currently defined classes. The contents of the list are owned by GTK+, but you must free the list itself with g_list_free() when you are done with it.
3.0
See Implementation
Returns the list of classes currently defined in @context.
Return: a #GList of strings with the currently defined classes. The contents of the list are owned by GTK+, but you must free the list itself with g_list_free() when you are done with it.