Store an `output_class` vector somehere?

[Artur-man]

Hey guys,

This is repeated in several places. Perhaps better to save it as a variable in the package, and call when needed ?

output_class = c("InMemory", "HDF5AnnData", "ReticulateAnnData")

[lazappi]

We could do this, which would definitely make updating it easier. The only thing is that it appears in the function documentation so if we changed it to something like output_class = .AnnData_classes users would then need to look up what the classes are somewhere. We do something similar for the generator functions and there might be a way to get it nicely inserted into the man pages so it's worth looking into I think.