If it's being continually maintained, a bit less likely than you might think.
When you get into projects that might be 100s of files with 200k lines of code. It reaches a point where no individual knows all the code or what points to what, so, an obscurely named function buried deep might not get spotted.
That's how Microsoft got caught stealing windows code, they didn't find the comment signature to erase it.
If it's being continually maintained, a bit less likely than you might think.
When you get into projects that might be 100s of files with 200k lines of code. It reaches a point where no individual knows all the code or what points to what, so, an obscurely named function buried deep might not get spotted.
That's how Microsoft got caught stealing windows code, they didn't find the comment signature to erase it.
Poorly phrased.
Windows 3.1 was stolen code. I'm fuzzy on the details, but it was proven in court and then a payoff before judgement.
Sorry, not trying to make stuff up, more like the story was like ~20 years ago and going from hazy memory.