title: Django prefetch_related From Model With Multiple ManyToMany Relationships
body: <p>Say I have a few models in Django:</p>
  
  <pre><code>class Foo(models.Model):
  bars = models.ManyToManyField(Bar)
  bazs = models.ManyToManyField(Baz)
  
  class Bar(models.Model):
  quxs = models.ManyToManyField(Qux)
  </code></pre>
  
  <p>I can use prefetch_related to get all Bars belonging to Foo and all Quxs belonging to Bar with:</p>
  
  <pre><code>Foo.objects.prefetch_related('bars__quxs')
  </code></pre>
  
  <p>But how can I use prefetch_related to get this information as well as all the Bazs belonging to Foo?  Would something like:</p>
  
  <pre><code>Foo.objects.prefetch_related('bars__quxs', 'bazs')
  </code></pre>
  
  <p>work?</p>