Secret.Collection.prototype.load_items_sync
function load_items_sync(cancellable: Gio.Cancellable): Boolean {
    // Gjs wrapper for secret_collection_load_items_sync()
}
  Ensure that the Secret.Collection proxy has loaded all the items present in the Secret Service. This affects the result of Secret.Collection.prototype.get_items.
For collections returned from Secret.Service.prototype.get_collections the items will have already been loaded.
This method may block indefinitely and should not be used in user interface threads.
- cancellable
- optional cancellation object 
- Returns
- whether the load was successful or not