protected boolean isSymbolWithLifespanVisible(TraceSymbolWithLifespan symbol,
			Lifespan lifespan) {
		if (!viewport.containsAnyUpper(lifespan)) {
			return false;
		}
		return true;
	}
Fires object-restored event on this view and all associated register views.
Ghidra/Debug/Framework-TraceModeling/src/main/java/ghidra/trace/database/program/DBTraceProgramView.java