sendToBack static method
Sends an active overlay below all current overlays.
Implementation
static bool sendToBack(String id, {int step = 1}) {
final current = getStackLevel(id);
if (current == null) return false;
final bottom = _controller.state
.map((e) => _effectiveStackLevel(e))
.fold<int>(current, (prev, next) => next < prev ? next : prev);
return setStackLevel(id, bottom - (step < 1 ? 1 : step));
}