isObscured property
Whether value should be obscured.
This option is usually set in combination with isTextField to indicate that the text field contains a password (or other sensitive information). Doing so instructs screen readers to not read out value.
Implementation
bool get isObscured => _flags.isObscured;Implementation
set isObscured(bool value) {
  _flags = _flags.copyWith(isObscured: value);
  _hasBeenAnnotated = true;
}