*<Null safety>*
void setRange (int start, int end, Iterable<E> iterable, [int skipCount = 0]) override
@override void setRange(int start, int end, Iterable<E> iterable, [int skipCount = 0]) { if (source.length != _initialSize) { throw ConcurrentModificationError(source); } RangeError.checkValidRange(start, end, length); source.setRange(start + start, start + end, iterable, skipCount); }