Bundled license information:
lit-html/async-directive.js:
/**
* @license
* Copyright 2017 Google LLC
* SPDX-License-Identifier: BSD-3-Clause
*/
lit-html/directives/ref.js:
/**
* @license
* Copyright 2020 Google LLC
* SPDX-License-Identifier: BSD-3-Clause
*/