How to check if a public go function/struct is not used outside of the package?

Question

Is there a way to check if a public function/struct is used outside of the package in which it's declared? I'm not writing a public go module that's consumed anywhere else, and simply want to scan whether func Foo() it's used anywhere in my codebase outside of the package in which it's declared.

I'm using GoLand but any programmatic solution would do.

Answer 1

Simplest solution: manually rename Foo() to Foo2(). Build/compile your project: if there are no compilation errors, it's not referenced in your code. Same check also works with any identifiers and with any IDEs (this doesn't use any of the IDE's features).

^{Obviously if you already have a Foo2 identifier, this will fail. But the idea is to rename it to a non-existing identifier...}