[Filter Snapshot]: Unable to read the 'value' value from the filter snapshot.

Unable to read the 'value' value from the filter snapshot.

```
final FilterState _filterState = FilterState();
Filters filterList = _filterState.snapshot();
Set fs = filterList.getFilters();
logger.info('filter>>>>:${fs.toString()}');
```
**value: product**
` INFO: filter>>>>:{FilterFacet{attribute: type, isNegated: false, value: product, score: null}}`

I want to display the selected filter value list in the UI, but I am unable to read the 'value'.