letter function

String letter({
  1. Casing? casing,
})

a function that returns a random letter.

Implementation

String letter({
  /// Default includes both upper and lower case. It's possible to specify one
  /// or the other.
  Casing? casing,
}) {
  if (casing == Casing.lower) {
    return _getRandomString(_lowerCaseChars);
  } else if (casing == Casing.upper) {
    return _getRandomString(_upperCaseChars);
  }
  return _getRandomString();
}