checkInfiniteRange function
Implementation
void checkInfiniteRange(String name, List<num> arr) {
assert(arr.length >= 2, name + ' must have at least 2 elements');
assert(
arr.length != 2 || arr[0] != -double.infinity || arr[1] != double.infinity,
name + 'cannot be ]-infinity;+infinity[ $arr',
);
}