@Override
	public Long getMaxSnap() {
		return snapshotStore.getMaxKey();
	}
TODO: This could be more sophisticated.... Does it need to be, though? Ideally, we'd only
keep state around that has annotations, e.g., bookmarks and code units. That needs a new
query (latestStartSince) on those managers, though. It must find the latest start tick
since a given snap. We consider only start snaps because placed code units go "from now
on out".
Ghidra/Debug/Framework-TraceModeling/src/main/java/ghidra/trace/database/time/DBTraceTimeManager.java