/**
     * Triggers the selected motions to be moved in the call-list (sort_parent, weight)
     * as children or as following after a selected motion.
     *
     * @param motions The motions to move
     */
    public async bulkMoveItems(motions: ViewMotion[]): Promise<void> {
        const title = this.translate.instant(
            'This will move all selected motions under or after the following motion in the call list:'
        );
        const options = [this.translate.instant('Set as parent'), this.translate.instant('Insert after')];
        const allMotions = this.repo.getViewModelList();
        const tree = this.treeService.makeTree(allMotions, 'weight', 'sort_parent_id');
        const itemsToMove = this.treeService.getTopItemsFromTree(tree, motions);
        const selectableItems = this.treeService.getTreeWithoutSelection(tree, motions);

        const selectedChoice = await this.choiceService.open(title, selectableItems, false, options);
        if (selectedChoice) {
            if (selectedChoice.action === options[0]) {
                // set choice as parent
                this.repo.sortMotionBranches(itemsToMove, selectedChoice.items as number);
            } else if (selectedChoice.action === options[1]) {
                // insert after chosen
                const olderSibling = this.repo.getViewModel(selectedChoice.items as number);
                const parentId = olderSibling ? olderSibling.sort_parent_id : null;
                const siblings = this.repo.getViewModelList().filter(motion => motion.sort_parent_id === parentId);
                const idx = siblings.findIndex(sib => sib.id === olderSibling.id);
                const before = siblings.slice(0, idx + 1);
                const after = siblings.slice(idx + 1);
                const sum = [].concat(before, itemsToMove, after);
                this.repo.sortMotionBranches(sum, parentId);
            }
        }
    }

 /**
  * Creates pdfMake definitions for a agenda list pdf from the given agenda items
  *
  * @param items A list of viewItems to be included in this agenda list. Items with the property 'hidden'
  * will be ignored, all other items will be sorted by their parents and weight
  * @returns definitions ready to be opened or exported via {@link PdfDocumentService}
  */
 public agendaListToDocDef(items: ViewItem[]): object {
     const tree: OSTreeNode<ViewItem>[] = this.treeService.makeTree(items, 'weight', 'parent_id');
     const title = {
         text: this.translate.instant('Agenda'),
         style: 'title'
     };
     const entries = this.createEntries(tree);
     return [title, entries];
 }