You can get started easily by installing the elixir-tools.vscode extension for VSCode and be off to the races!
https://marketplace.visualstudio.com/items?itemName=elixir-t...
The answer to your question is in the FAQ on the website for Next LS in particular, and a motivation for the whole elixir-tools family of projects on the home page
Not sure how I’ve never heard of elixir tools in spite of being a full time elixir dev.
Going to install this first thing tomorrow.
I hope you guys are adding first class test and debugging support too. (Maybe you have, I haven’t read the whole list of features)