Conditional hiding of form collections

[nicomarg]

I am using df-show/df-hide on fields/fieldsets to hide some stuff dynamically, and was wondering if there was a way to hide FormCollections in the same way.
More precisely, I'm using a form collection with siblings to handle a One-To-Many relation, but this is only useful when some other condition on the form is met, and I would like to hide the whole form collection otherwise.

[jrief]

I believe that such a feature can be implemented. However, with a FormCollection with siblings there might be some validation issues. I will check if this is possible.

Btw. what is the ue-case where this is needed?

[nicomarg]

My use case is to have a single form to create instances of different Child models of the same model (selected based on a ChoiceField). Thus, the relevant fields change dynamically, and one of the child models has a many-to-one relation, which the others don't have. The rest of the data changing from model to model can be handled by Fields, and thus be hidden dynamically, but not the FormCollection handling the many-to-one relation.
I can work around this limitation by asking the user to first create the object, then redirect them to the edit view on the object they just created where they can edit the many-to-one (because at this point we know which child model is being edited, thus we can have different forms for the different child models)