title: Access vue vuex namespaced getter from template
body: <p>I have made vuex namespaced getter mapping in my <code>.vue</code> component like this:</p>
  <pre><code>...mapGetters([
    'fooModule/barGetter'
  ])
  </code></pre>
  <p>How do I access this getter in the <code>.vue</code> component template?
  I have tried <code>{{fooModule.barGetter}}</code> but it doesn't seem to work, <code>{{fooModule/barGetter}}</code> is obviously wrong.</p>
  <p>I could assign another key to the getter in <code>mapGetters</code> by</p>
  <pre><code>...mapGetters({
      fooBarGetter: 'fooModule/barGetter'
  })
  </code></pre>
  <p>This allows me to access the value in the template by using <code>{{forBarGetter}}</code></p>
  <p>However, I am wondering if there is a way to access the <code>'fooModule/barGetter'</code> without assigning it another key. Is it possible? if so how?</p>