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 GtkEntryCompletion API. Completion is disabled if @completion is set to %NULL.
The GtkEntryCompletion or %NULL
See Implementation
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 GtkEntryCompletion API. Completion is disabled if @completion is set to %NULL.