Accessibility Tree
アクセシビリティツリー
https://developer.mozilla.org/ja/docs/Glossary/Accessibility_tree
https://zenn.dev/yusukehirao/books/1ec099b9717588/viewer/acab21
https://speakerdeck.com/sukoyakarizumu/reading-accessibility-tree
https://youtu.be/joHJJSklFic?t=2623