filterOnSave method

@override @protected @mustCallSuper DynamicMap filterOnSave(DynamicMap save)

You can filter the saving content when it is saving.

Edit the value of save and return.

Implementation

@override
@protected
@mustCallSuper
DynamicMap filterOnSave(DynamicMap save) {
  var tmp = "";
  for (final key in searchableKey) {
    if (key.isEmpty || !save.containsKey(key)) {
      continue;
    }
    final val = save.get(key, "");
    tmp += val;
  }
  if (tmp.isEmpty) {
    return super.filterOnSave(save);
  }
  save[searchValueKey] =
      tmp.toLowerCase().splitByBigram().toMap((e) => MapEntry(e, true));
  return super.filterOnSave(save);
}