ref trace for inspector

[patricklx]

function test() {
  return 'test';
}

let Test = <template>
  {{@x}}
</template>

function myHelper(v) {
  return v + ' more'
}


let MyTemplateOnly = <template>
  Hello World from Template Only Component
  {{#let 1 test as |_ x|}}
    <Test @x={{(myHelper (x))}}/>
  {{/let}}
  {{yield to='outlet'}}
</template>