Why would I use rollupAdapter instead of fromRollup?

[claudio-darkkenergy]

I've looked at the source code for rollupAdapter, and I've seen it used in the documentation here: https://modern-web.dev/docs/dev-server/plugins/rollup/

The docs don't explain this at all. In the docs, It's shows the rollup json plugin wrapped in rollupAdapter, but then later in the JSON example, it shows it wrapped in fromRollup. What's the difference?