Sets completion to be the auxiliary completion object
to use with entry.
All further configuration of the completion mechanism is
done on completion using the gtk.entry_completion.EntryCompletion API.
Completion is disabled if completion is set to null.
Sets completion to be the auxiliary completion object to use with entry.
All further configuration of the completion mechanism is done on completion using the gtk.entry_completion.EntryCompletion API. Completion is disabled if completion is set to null.