src/vs/editor/standalone/browser/accessibilityHelp/accessibilityHelp.ts/AccessibilityHelpWidget/show
class AccessibilityHelpWidget:	public show(): void {
		if (this._isVisible) {
			return;
		}
		this._isVisible = true;
		this._isVisibleKey.set(true);
		this._layout();
		this._domNode.setDisplay('block');
		this._domNode.setAttribute('aria-hidden', 'false');
		this._contentDomNode.domNode.tabIndex = 0;
		this._buildContent();
		this._contentDomNode.domNode.focus();
	}