Earlier quoted context omitted.
Then, surely, you should be able to find a link to a ECS class's source easily. So where is it? Also, remember, it's not my responsibility to search to prove your arguments. Burden of proof is on the claimant, as it goes.
https://jslee02.github.io/awesome-entity-component-system/
Taking a cursory look (which is already beyond my responsibilities) at https://github.com/redxdev/ECS/blob/master/ECS.h, by searching "class ECS" and "struct ECS" and "EntityComponentSystem" wields no results.