src/vs/editor/standalone/browser/standaloneCodeEditor.ts/createAriaDomNode
function createAriaDomNode(parent: HTMLElement | undefined) {
	if (!parent) {
		if (ariaDomNodeCreated) {
			return;
		}
		ariaDomNodeCreated = true;
	}
	aria.setARIAContainer(parent || document.body);
}