private void _resolveOverflowStart(int index) {
assert _stations != null;
assert index >= 0;
assert index < _stations.size();
Station station = _stations.get(index);
station.setOverflowStart(true);
if (station.hasNext() && station.getNext().isDisabled()) {
// If next stop is disabled, so is the overflow
station.setDisabled(true);
}
station.setPrevious(null);
}
