While working on a dexterity based project I needed one of my content types to support collective.quickupload by marking it with the IQuickUploadCapable interface.

What I'm currently doing is adding an 'implements' to my configure.zcml file:

```
`<class class="plone.dexterity.content.Container">      
     <implements interface="collective.quickupload.browser.interfaces.IQuickUploadCapable" />
 </class>`

```

Since my content type is a Container this works however my first inclination was to use a grok style approach instead of declaring it in ZCML. What's the grok/dexterity way to tell my dexterity content type that it implements an additional interface, or should I stick to the current approach?

Also I tried adding the interface as a behaviour in my `profiles/default/types/my.dexterity.content.xml` file but this didn't work (I didn't really expect it to as behaviours serve a different purpose).