If no area is specified when creating the entry completion with [gtk.entry_completion.EntryCompletion.newWithArea], a horizontally oriented [gtk.cell_area_box.CellAreaBox] will be used.
EntryCompletion.cellArea
gtk.cell_area.CellArea cellArea() @propertyGet cellArea property.
Returns
The [gtk.cell_area.CellArea] used to layout cell renderers in the treeview column.