default TraceThread createThread(String path, long creationSnap) throws DuplicateNameException {
		return addThread(path, Lifespan.nowOn(creationSnap));
	}
Add a thread with the given creation snap

@see #addThread(String, Lifespan)
Ghidra/Debug/Framework-TraceModeling/src/main/java/ghidra/trace/model/thread/TraceThreadManager.java