type FramebusOptions = {
  origin?: string, // default: "*"
  broadcastMode?: string, // default "all
  channel?: string, // no default
  verifyDomain?: (url: string) => boolean, // no default
};

    const Framebus = require('framebus-sw');

    // default bus instance
    const bus = new Framebus();
    const defaultBus = new Framebus({ broadcastMode: 'all' });

    // bus instance only posts messages to itself
    const selfBus = new Framebus({
        origin: location.origin,
        broadcastMode: 'self'
    });

    // bus instance only posts messages to its verified parent
    const parentBus = new Framebus({
        origin: 'http://parent_origin.com'
        broadcastMode: 'parent'
    });

    // bus instance only posts messages to the verified children
    const childrenBus = new Framebus({
        origin: 'http://children_1.com'
        broadcastMode: 'children'
    });