anchor.diff:    /// Use `getCollectionInfos` instead
     @deprecated
     Stream<Map> collectionsInfoCursor([String collectionName]) {
  -    return _collectionsInfoCursor(collectionName).stream;
  +    return _collectionsInfoCursor(collectionName);
     }
     Stream<Map>  _collectionsInfoCursor([String collectionName]) {
       Map selector = {};
  
positive.code:   /// Use `getCollectionNames` instead
    @deprecated
    Future<List<String>> listCollections() {
      return _collectionsInfoCursor().stream.map((map) => map['name'].split('.')).where((arr)=> arr.length == 2).map((arr)=> arr.last).toList();
    }
  
    
  
negative.code:   }
    
    Future<List<String>> getCollectionNames([Map filter = const {}]) {
        return _listCollectionsCursor(filter).map((map) => map['name']).toList();
    }
      
    
  