addRangeToLast method
Adds a range from the specified start
ID towards to the last *
element.
Implementation
void addRangeToLast(int start) {
if (start == 0) {
throw StateError('sequence ID must not be 0');
}
// start:*
final wasEmpty = isEmpty;
_isLastAdded = true;
_ids.addAll([start, RANGESTAR]);
_text = wasEmpty ? '$start:*' : null;
}