Ecommerce Framework: working with product set

Hi!

In my next project I need to work with complex products, such as package, configurable or product with optional information (for example uploaded logo).

I saw that Ecommerce Framework has a class AbstractProductSet that, for what I understand, is that I need: I can’t find any documentation about this topic.

Can anybody tell me where I can find documentation or example?

Thanks in advance

Marco Chinchio