SysVI model and normalized expression

Hello, I was working through this example for running SysVI:

And tried running get_normalized expression. However, I get this error:
AttributeError: ‘SysVI’ object has no attribute ‘get_normalized_expression’

However, the API indicates this is an attribute:

Am I doing something wrong, or do I somehow need to convert this SysVI object to a scvi object?

Any help would be greatly appreciated!

See GitHub issue. Please mark if you double post this makes it easier for the community.