Add separator between code to use on leetcode and local only code like test cases and struct definition?

[c-git]

I'm thinking it would be good to have a separator between the code that needs to be copied to leetcode and the code that is only used locally. Like maybe the below

// <<----- Code below here is only for local use ----- >>

Right now I've added just an empty line but I'm thinking something like the snippet above would be better.

[c-git]

This has been merged into develop