Get value from Box Event to make my query in hive

Why I can't find an example about watch listener?
I have this method :

```
Stream> watchVocabsFromdb() => hiveService.vocabularyBox
.watch()
.map((event) => hiveService.vocabularyBox.values
.where((element) => element.remember == true)
.toList());
```
I want every time my box is changed I get new value so I wrote above code, But I always receive empty value In the event that in this method return values :
```
List getRememberVocabsFromdb() =>
hiveService.vocabularyBox.values
.where((element) => element.remember == true)
.toList();
```

How can I get value from Box Event to make my query?

Start with the watchVocabsFromdb and getRememberVocabsFromdb methods shown in the issue, then inspect how Box.watch events relate to reads from vocabularyBox.values. A complete resolution should explain the empty filtered result and establish the expected values emitted whenever the box changes.

Written by the indexing model from the issue text.