Hey Mike (@drmibell), normally I would do it like that but I was experimenting for a new contribution that determines the memory usage of selected nodes. If a function node stores it's data on 'this', then the size of that data should also become visible via the new contribution. But it doesn't at the moment 
Hi Dave (@dceejay), that indeed makes sense. But that suddenly turns a function node already into an exception, when I want to determine the memory size of each node. Damn that makes it again more complex, especially since there are other nodes that use sandboxes. I assume there is no easy way to get hold of the sandbox and its data ...
