Does anybody know if there is a way of getting the source block (or position of it) from a flowing block? Here's an example of something I mean (this would be in the fluid block class):

if (meta>0) {
    something.getSourceBlock()
}

From what I know about how liquid spreading works, I doubt that it's possible in a simple way, but I thought I'd check here.

OK. I thought that was the case. Thank you for clarifying anyway.