import { AbstractStackBuilder } from '.' ; import Branch from './branch' ; export default class MetaStackBuilder extends AbstractStackBuilder { protected getBranchParent ( branch ) { return branch . getParentFromMeta ( ) ; } protected getChildrenForBranch ( branch ) { return branch . getChildrenFromMeta ( ) ; } protected getParentForBranch ( branch ) { return branch . getParentFromMeta ( ) ; } }