/**
* Helper function for move(int). Assumes that count is in range!
*
* @param count the number of chars to move. Negative values move back, positive values move
* forward.
* @param currentOffset the current offset for copyCursor
* @return the updated offset
*/
private int _move(int count, int currentOffset) {
if (count == 0) return currentOffset;
Iterator it = this;
// make copy of cursor and return new iterator?
if (count > 0) return it._moveRight(count, currentOffset);
return it._moveLeft(-count, currentOffset); // count < 0
}