How to use the ember-runtime/system/lazy_load.onLoad function in ember-runtime

import { onLoad } from 'ember-runtime/system/lazy_load';
import RoutingService from 'ember-routing/services/routing';

onLoad('Ember.Application', function(Application) {
  Application.initializer({
    name: 'routing-service',
    initialize(registry) {
      // Register the routing service...
      registry.register('service:-routing', RoutingService);
      // Then inject the app router into it
      registry.injection('service:-routing', 'router', 'router:main');
    }
  });
});

import { onLoad } from "ember-runtime/system/lazy_load";

var name = 'deferReadiness in `testing` mode';

onLoad('Ember.Application', function(Application) {
  if (!Application.initializers[name]) {
    Application.initializer({
      name: name,

      initialize(registry, application) {
        if (application.testing) {
          application.deferReadiness();
        }
      }
    });
  }
});

function registerComponentLookup(container) {
  container.register('component-lookup:main', ComponentLookup);
}

/*
  We tie this to application.load to ensure that we've at least
  attempted to bootstrap at the point that the application is loaded.

  We also tie this to document ready since we're guaranteed that all
  the inline templates are present at this point.

  There's no harm to running this twice, since we remove the templates
  from the DOM after processing.
*/

onLoad('Ember.Application', function(Application) {
  Application.initializer({
    name: 'domTemplates',
    initialize: _bootstrap
  });

  Application.initializer({
    name: 'registerComponentLookup',
    after: 'domTemplates',
    initialize: registerComponentLookup
  });
});

export default bootstrap;

import { onLoad } from "ember-runtime/system/lazy_load";
import linkToComponent from "ember-routing-views/views/link";

onLoad('Ember.Application', function(Application) {
  Application.initializer({
    name: 'link-to-component',
    initialize(registry) {
      registry.register('component:-link-to', linkToComponent);
    }
  });
});

import { onLoad } from "ember-runtime/system/lazy_load";
import TextField from "ember-views/views/text_field";
import TextArea from "ember-views/views/text_area";
import Checkbox from "ember-views/views/checkbox";
import LegacyEachView from "ember-views/views/legacy_each_view";

onLoad('Ember.Application', function(Application) {
  Application.initializer({
    name: 'ember-views-components',
    initialize(registry) {
      registry.register('component:-text-field', TextField);
      registry.register('component:-text-area', TextArea);
      registry.register('component:-checkbox', Checkbox);
      registry.register('view:-legacy-each', LegacyEachView);
    }
  });
});