sublist method Null safety

Int64List sublist(
  1. int start,
  2. [int? end]
)
inherited

Implementation

L sublist(int start, [int? end]) {
  // NNBD: Spurious error at `end`, `checkValidRange` is legacy.
  int endIndex = RangeError.checkValidRange(start, end!, length);
  int sublistLength = endIndex - start;
  L result = _createList(sublistLength);
  result.setRange(0, sublistLength, _list, start);
  return result;
}