Add support for generating factories

[repolevedavaj]

Instead of just having one instance of a FormGroup, I would like to have a factory to create as much instances as required.

[martinmcwhorter]

What are the usecases for this?

I am open to a PR that adds this as command line option.

[repolevedavaj]

What are the usecases for this?

I am open to a PR that adds this as command line option.

We have some forms, in which the user can add elements, therefore we create multiple instances of a form group.
Regarding the PR: We are currently working on a custom solution matching our needs, but if we have something generic enough, we gladly share it. :)