Gcr.ImportInteraction::supplement_async

function vfunc_supplement_async(builder: Gck.Builder, cancellable: Gio.Cancellable, callback: Gio.AsyncReadyCallback): void {
}
  

Asynchronously supplement attributes before import. This means prompting the user for things like labels and the like. The needed attributes will have been passed to Gcr.ImportInteraction.prototype.supplement_prep.

This method prompts the user and fills in the attributes.