Supporting an EMR connection in the schedule and invoke Python API

When comparing the CLI version of `run-notebook` vs the Python API of `invoke` and `schedule` functions, I noticed a discrepancy that is important for the use case that I am currently working on.

You aren't able to specify the EMR connection within the Python API Notebook commands, where is in the CLI you can. Is there a specific reason for the difference? Is there a suggested way to connect to an EMR cluster via `invoke` or `schedule`?