How can I check what mining algorithm does an altcoin use? Where in the sourcecode files can this be checked?

For example, lets get a specific coin:

Chronon
https://github.com/ChrononGroup/Chronon

In what file can one check the mining algorithm?
Depending on the coin, you can find the PoW algorithm by perusing the source code of the coin. For the coin you referenced, reviewing the directory Chronon/src/pow.cpp one can see the algorithm is X11.