private void findNext() {
		try {
			while (nextData == null && (forward ? it.hasNext() : it.hasPrevious())) {
				DBRecord record = forward ? it.next() : it.previous();
				nextData = codeMgr.getDataDB(record);
			}
		}
		catch (IOException e) {
		}
	}
@see ghidra.program.model.listing.CodeUnitIterator#next()
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/DataRecordIterator.java