src/vs/workbench/contrib/notebook/browser/view/cellParts/markdownCell.ts/StatefulMarkdownCell/constructDOM
class StatefulMarkdownCell:	private constructDOM() {
		// Create an element that is only used to announce markup cell content to screen readers
		const id = `aria-markup-cell-${this.viewCell.id}`;
		this.markdownAccessibilityContainer = this.templateData.cellContainer;
		this.markdownAccessibilityContainer.id = id;
		// Hide the element from non-screen readers
		this.markdownAccessibilityContainer.style.height = '1px';
		this.markdownAccessibilityContainer.style.position = 'absolute';
		this.markdownAccessibilityContainer.style.top = '10000px';
		this.markdownAccessibilityContainer.ariaHidden = 'false';

		this.templateData.rootContainer.setAttribute('aria-describedby', id);
		this.templateData.container.classList.toggle('webview-backed-markdown-cell', true);
	}