tryFromArray method
Implementation
JSON? tryFromArray(dynamic key) {
if (key is List) return null;
final list = this.list;
if (list == null) return null;
final index = JSON(key).int;
if (index == null) return null;
if (index < 0 || index >= list.length) return null;
return JSON(list[index], JSONKey(this, index));
}