Sets the flap position for self.
If it's set to gtk.types.PackType.Start, the flap is displayed before the content, if gtk.types.PackType.End, it's displayed after the content.
the new value
Deprecated: See the migration guide
Sets the flap position for self.
If it's set to gtk.types.PackType.Start, the flap is displayed before the content, if gtk.types.PackType.End, it's displayed after the content.