Likely. Why is everyone acting like this is some high conspiracy or even blaming the entire project - this was probably some lazy dev that didn't want to deal with the hassle of including the licence and just copy pasted the class. I used to do this when I was learning to code, I often reimplemented stuff already available for learning and would just copy paste large chunks. I didn't publish any work back then and I realised it was a bad habit because I didn't know what the code does - but I get where it comes from.
It was fixed and nobody was harmed.
The outrage in GH issues is ridiculous.