How to use the ember-concurrency.allSettled function in ember-concurrency

if (!this.node || this.node.isRoot) {
            return [];
        }

        const parentId = this.node.belongsTo('parent').id();
        const rootId = this.node.belongsTo('root').id();

        // One ancestor
        if (parentId === rootId) {
            const parentNode = yield this.node.parent;
            const { id, title }: {id: string, title: string } = parentNode;
            return [{ id, title }];
        }

        // At least two ancestors
        const results = yield allSettled([
            this.node.root,
            this.node.parent,
        ]);

        const ancestors = results
            .mapBy('value')
            .compact()
            .map(({ id, title }: { id: string, title: string }) => ({ id, title }));

        // Results might have undefined `value` if ancestors are private
        if (ancestors.length > 1) {
            const parent = results[1].value;
            if (parent && parent.belongsTo('parent').id() !== rootId) {
                ancestors.insertAt(1, { id: '', title: this.i18n.t('general.ellipsis') });
            }
        }