set_flap_position
Description:
Sets the flap position for this.
Note:
See [the migration guide](migrating-to-breakpoints.html#replace-adwflap)
If it's set to `GTK_PACK_START`, the flap is displayed before the content, if `GTK_PACK_END`, it's displayed after the content.
Parameters:
this |
a flap |
position |
the new value |