dropLast abstract method
Drop the last
count characters from the range.
Retracts the end of the range to before the
count last characters
of the range, or as many as are available if
there are fewer than
count characters in the current range.
count must not be negative.
If it is zero, the range is not changed.
true if there are
count characters in the range,
false if there are fewer.
bool dropLast([int count = 1]);