How to use the @mapbox/batfish/modules/route-change-listeners.addRouteChangeEndListener function in @mapbox/batfish

description: blah blah blah
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import React from 'react';
import {
  addRouteChangeStartListener,
  addRouteChangeEndListener
} from '@mapbox/batfish/modules/route-change-listeners';
import { PageShell } from '../../components/page-shell';
import { sharedImport } from '../../components/shared-import';
sharedImport();

addRouteChangeStartListener('/about/security/', pathname => {
  console.log(`${pathname} starting to load`);
});

addRouteChangeEndListener('/about/security/', pathname => {
  console.log(`${pathname} ending its load`);
});

class Security extends React.Component {
  render() {
    return security;
  }
}

export default Security;