anchor.diff:        .find({'value': 'value_modified_for_only_one_with_default'}).toList();
     expect(results.length, 1);
   
  -  result = await collection.update(
  -      where.eq('key', 'a'),
  -      modify.set(
  -          'value', 'value_modified_for_only_one_with_multiupdate_false'),
  +  result = await collection.update(where.eq('key', 'a'),
  +      modify.set('value', 'value_modified_for_only_one_with_multiupdate_false'),
         multiUpdate: false);
     expect(result['updatedExisting'], true);
     expect(result['n'], 1);
  
positive.code:     {"name": "Nick", "score": 5}
    ]);
  
    var result = await collection.findOne(
        where.eq('name', 'Vadim').fields(['score']));
  
    expect(result['name'], isNull);
    expect(result['score'], 4);
  
negative.code:     await collection.insert({"my_field": n, "str_field": "str_$n"});
    }
  
    var result = await collection
        .find(where.gt("my_field", 5).sortBy('my_field'))
        .toList();
    expect(result.length, 4);
    expect(result[0]['my_field'], 6);
  