system property

set system (Brightness value)

The system's appearance: the bar's own until the backdrop says otherwise.

Implementation

set system(Brightness value) {
  if (value == _system) {
    return;
  }
  _system = value;
  if (!_sampled) {
    _dark = value == Brightness.dark;
    _snap();
  } else {
    _decide();
    _aim();
  }
}