nextString method
Returns a random String consisting of letters and numbers, by default
the length
of the string will be 16 characters.
Implementation
String nextString({
int length = 16,
String chars =
'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz1234567890',
}) {
return String.fromCharCodes(Iterable.generate(
length, (_) => chars.codeUnitAt(nextInt(chars.length))));
}