Hiding Output elements via Python or CodeBlock

I have a list of Coordinate Systems generated (by a code block) which I need to use as input in another node, but I want them hidden from view to reduce visual clutter. Is there API to hide output?

to clarify: checking/unchecking the Preview of a nodes operates on all outputs, I would like to do this per output.

Here’s what I thought of. It’s kinda silly but it works.

Turn off visibility of code block then through another with just an input to pass through. This will enable you to be selective of what to show.