A way to group blocks of generated output

## Motivation
Some users are particularly interested in the organization of generated output code. Within a single module, there can be a desire to group together certain logic in the output.

## Desired solution
Some way of grouping in-line modules so that they can be located together in generated outputs.

## Alternatives considered
- Maybe a class which takes a list of objects as a constructor. This would need to potentially take modules, assignments, etc.
- Maybe some sort of tagging mechanism?