The problem was how to be able to pass in optional links, buttons, etc. into an x-box from the parent template in a reusable fashion

The structure is

• x-box
  • x-box-header
    • x-box-tools
  • x-box-body

where x-box-tools is the conditionally displayed 'tools' display location. It shouldn't display

• 327f97ffebe53ed80369f06d951992cf1c4c796e - one level deep params passing/yielding
• 9e717d6d232a7ba2baa91338136df90c25391807 - deep yielding & box overrides
• 20bf54f2e1899fb3e42d030ac0bf0cf4fe6536b7 - using ember-component-helpers' array template helper to pass in links - get rid of all the yields and don't allow customization (in an app, one would like the elements to be consistent)

• check out the interesting commits
• cd tests/dummy/
• ember serve
• Visit your app at http://localhost:4200.

• the ember source code
• the ember guide
  • wrap content in a component
  • supporting both block & inline params
  • the hash template helper
• ember-bootstrap custom tabs implementation
  • bs-tab.hbs
  • its usage under 'Custom Tabs' section

For more information on using ember-cli, visit https://ember-cli.com/.