@Override
		public OldFunctionDataDB next() {
			if (hasNext || hasNext()) {
				hasNext = false;
				return func;
			}
			return null;
		}
@see ghidra.program.model.listing.FunctionIterator#next()
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/oldfunction/OldFunctionManager.java