I'm building a MailChimp template and would like to have nested repeatable variants. Something like this

```
-- Variant 1A
  -- Variant 2A
  -- Variant 2B
-- Variant 1B
  -- Variant 3A
  -- Variant 3B
-- Variant 1C
  -- Variant 4A
  -- Variant 4B

```

When I nest `mc:repeatable=""` and `mc:variant=""` elements inside another repeatable/variant tag it doesn't work. The inner repeatables don't appear in the editor. Removing the inner repeatable/variant tags makes the content appear again, but the ability to repeat the content blocks is lost obviously. 

Here's a full example of the code:

```
<tr mc:repeatable>
  <td>
<table>

  <tr mc:repeatable="rating" mc:variant="variant1">
    <td>    
      <div mc:edit="text">

      </div>                                                                    
    </td>
  </tr>

  <tr mc:repeatable="rating" mc:variant="variant2">
    <td>                                            
      <div mc:edit="text">

      </div> 
    </td>
  </tr>

</table>
  </td>
</tr>

```

Has anyone been able to nest repeatable/variant blocks in a MailChimp template?