Grep.app Alternative?

https://grep.app/ has served me well for the last couple of years finding snippets for random APIs.

But recently I found that certain strings from open-source projects suddenly yield no results.

For example: VaultServiceTimeout from https://github.com/rajanadar/VaultSharp has no results for https://grep.app/search?q=VaultServiceTimeout.

Is there some alternative service for this task that is up-to-date?