New Twiddle

components.production-checker.js

import Component from '@ember/component';
import { inject as service } from '@ember/service';
import { computed } from '@ember/object';

export default Component.extend({
  businessValidator: service('business-validator'),
  doesBusinessValidate: computed('model', function() {
     if (this.get('businessValidator').validate()) {
      return "Ready for business!";
     } else {
       return "Production is halted!";
     }
  })
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

services.business-validator.js

import Service, { inject as service } from '@ember/service';

export default Service.extend({
  someBool: false,
  validate() {
    // mocj actual code
    this.toggleProperty('someBool');
    return false;
  }
});

templates.application.hbs

{{production-checker}}

templates.components.production-checker.hbs

doesBusinessValidate:
{{doesBusinessValidate}}

{{businessValidator.someBool}}

twiddle.json

{
  "version": "0.8.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "ember": "3.1.4",
    "ember-data": "3.1.2",
    "ember-template-compiler": "3.1.4"
  }
}