How do you check a dart list?

To create an empty list, use [] for a growable list or List. empty for a fixed length list (or where growability is determined at run-time). The created list is fixed-length if length is provided. The list has length 0 and is growable if length is omitted.

List<E>. filled constructor Null safety Creates a list of the given length with fill at each position. The length must be a non-negative integer. The created list is fixed-length if growable is false (the default) and growable if growable is true.