toogleSelectionFor method
Implementation
bool toogleSelectionFor(DocumentReference ref) {
if (!_selectionIsActive) {
_selectionIsActive = true;
selectedRefs.clear();
}
if (selectedRefs.any((x) => x.id == ref.id)) {
selectedRefs.removeWhere((x) => x.id == ref.id);
notifyListeners();
return false;
} else {
selectedRefs.add(ref);
notifyListeners();
return true;
}
}