gobject:type-from-instance (instance)

instance -- a valid g:type-instance instance

The g:type-t type ID of instance.

Gets the type identifier from a given instance. Signals an error if the instance argument is not a valid g:type-instance instance.

(g:type-from-instance (make-instance 'g:simple-action))
=> #<GTYPE :name "GSimpleAction" :id 97556076810288>