[flutter2^]新しくなったListについて

NOTICE: This constructor cannot be used in null-safe code. Use [List.filled] to create a non-empty list. This requires a fill value to initialize the list elements with. 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).

var fixedLengthList = List<int>.filled(5, 0);
fixedLengthList.length = 0;  // Error
fixedLengthList.add(499);    // Error
fixedLengthList[0] = 87;
var growableList = [1, 2];
growableList.length = 0;
growableList.add(499);
growableList[0] = 87;