How to provide custom styles for a FAST foundation component?

[logan2z]

I am creating a component library using FAST Foundation and, in some cases, I'd simply like to use a Foundation component but style it in a different way. I see some documentation on the compose API that seems to fit the bill, but I'm not completely sure how the style attribute in the compose options should be created.

Do the Foundation styles need to be merged with my custom styles before calling compose? Or can my custom styles just be sent into the compose call and they will be automatically merged with the Foundation component's styles? If the former, how does one access the base Foundation component styles in order to use them as the basis for the merged styles?

I have looked through the docs and couldn't find an example piece of code that did this.