on line tutorial missing a reference point

[RenBean]

I'm probably only noticing this because I am so new at coding; but walking though your tutorial https://springframework.guru/spring-boot-web-application-part-4-spring-mvc/ I noticed that the reference to building a second service ProductServiceImpl.java was missing under your Spring Data JPA Product Service Implementation... This made things a bit confusing thus why I am on your gitHub now.

there is a data corruption in one of the code links:
@OverRide
public Iterable<Product> listAllProducts() {
return productRepository.findAll();
} //and a prior one as well...
(using chrome browser)

Also, thank you, your tutorials are very informative and useful.
(Sep 2016)