moveBackTo method Null safety
- Characters target
Moves the range to the last occurrence of
before the current range.
If there is an occurrence of
target in the characters preceding
the current range,
then the new range contains exactly the last such occurrence of
If there is no occurrence of
target after the current range,
the range is not modified.
true if the range is modified and
false if not.
bool moveBackTo(Characters target);