src/vs/workbench/api/common/extHostWebviewView.ts/ExtHostWebviewView/badge
class ExtHostWebviewView:	public set badge(badge: vscode.ViewBadge | undefined) {
		this.assertNotDisposed();

		if (badge?.value === this.#badge?.value &&
			badge?.tooltip === this.#badge?.tooltip) {
			return;
		}

		this.#badge = ViewBadge.from(badge);
		this.#proxy.$setWebviewViewBadge(this.#handle, badge);
	}