Specifies the type of the function passed to glib.completion.Completion.new_. It should return the string corresponding to the given target item. This is used when you use data structures as #GCompletion items.
the string corresponding to the item.
Deprecated: Rarely used API
Specifies the type of the function passed to glib.completion.Completion.new_. It should return the string corresponding to the given target item. This is used when you use data structures as #GCompletion items.