src/vs/workbench/contrib/preferences/browser/keybindingsEditor.ts/KeybindingsEditor/createAriaLabelElement
class KeybindingsEditor:	private createAriaLabelElement(parent: HTMLElement): void {
		this.ariaLabelElement = DOM.append(parent, DOM.$(''));
		this.ariaLabelElement.setAttribute('id', 'keybindings-editor-aria-label-element');
		this.ariaLabelElement.setAttribute('aria-live', 'assertive');
	}