Any practical reason to supply container of container of types? It's either single type or multiple types in which case container (e.g. list, tuple, etc.) of types is enough. Just unpack your nested structure.
Sorry, I misread the question
Sorry, I misread the question
If you can't explain it to a six year old, you don't understand it yourself, Albert Einstein
How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs
How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs