_registerEngine(name) {
    let owner = getOwner(this);
    if (!owner.hasRegistration('engine:' + name)) {
      owner.register(
        'engine:' + name,
        window.require(name + '/engine').default,
      );
    }
  }
Registers an Engine that was recently loaded.

@private
@method _registerEngine
@param {String} name
@return {Void}