It might happen on some of your API's endpoints, that the object your app is waiting for depends on the data sent. Say, the user sends `{type:foobar, data: XXX}`, then the `XXX` formats will depend on the type `foobar`.

So how can one validate this data if we don't even know its type ?
Well come on in, I'll show you how ! You can actually validate dynamic data by using the most of the features available in Symfony.