dropBackTo method Null safety

bool dropBackTo(
  1. Characters target

Drops the last occurrence of target in the range.

If the range contains any occurrences of target, then all characters after the start of the first such occurrence is removed from the range. This retracts the end of the range to the start of the last occurrence of target.

If there are no occurrences of target in the range, the range is not changed.

Returns true if there is an occurrence of target and false if not.


bool dropBackTo(Characters target);