@advanced-rest-client/arc-overlay-mixin/index.js

arc-overlay-mixin is a port of iron-overlay-behavior that works with web components

export { ArcOverlayMixin } from './src/ArcOverlayMixin.js';
export { ArcOverlayBackdrop } from './src/ArcOverlayBackdrop.js';
export { ArcOverlayManager } from './src/ArcOverlayManager.js';
export { ArcFocusableHelper } from './src/ArcFocusableHelper.js';