I mean, you could just search for the method called, if you're REAAALLLLLYYY averse to using any IDE or editor of the last 10 years. Which would be an odd choice to base language decisions on.
Maybe you need to start using IDE, instead of programming in nano.
Maybe you need to go work for GitHub to fix their code search references, instead of trying to act superior to random people on the internet.
I'm using Intellij, VSCode and Code Search for searching, why would I use GitHub for it?