Returns the number of instances allocated of the particular type; this is only available if GLib is built with debugging support and the instance-count debug flag is set (by setting the GOBJECT_DEBUG variable to include instance-count).
a #GType
the number of instances allocated of the given type; if instance counts are not available, returns 0.
Returns the number of instances allocated of the particular type; this is only available if GLib is built with debugging support and the instance-count debug flag is set (by setting the GOBJECT_DEBUG variable to include instance-count).