import { AbstractWalker } from './abstract_walker.js'; export class DummyWalker extends AbstractWalker { up() { return null; } down() { return null; } left() { return null; } right() { return null; } repeat() { return null; } depth() { return null; } home() { return null; } getDepth() { return 0; } initLevels() { return null; } combineContentChildren(_type, _role, _content, _children) { return []; } findFocusOnLevel(_id) { return null; } }