I am considering switching from IntelliJ back to Emacs.
One of my favorite feature sin IntelliJ is that I can put the cursor over a function / struct of a dependency (i.e. code I did not write), and jump to it's definition. This involves IntelliJ unzipping the dependency sources somewhere and indexing it.
Question: is there a way to achieve this in Emacs? (If so, can you share relevant sections of ~/.emacs.d/init.el)