isSortedByKey<K extends Comparable<K> > method
Checks if the elements of this slice are sorted using the given key extraction function.
Implementation
bool isSortedByKey<K extends Comparable<K>>(K Function(T) key) {
for (int i = _start; i < _end - 1; i++) {
if (key(_list[i]).compareTo(key(_list[i + 1])) > 0) {
return false;
}
}
return true;
}