anchor.diff:    String familyName;
   
     @ORM.DBField()
  +  double weight;
  +
  +  @ORM.DBField()
     DateTime created;
   
     String toString() {
       return 'User { id: $id, ' +
  -    'givenName: \'$givenName\', familyName: \'$familyName\' }';
  +    'givenName: \'$givenName\', familyName: \'$familyName\', weight: \'$weight\' }';
     }
   }
   
  
positive.code:   expect(foundModified.id, u.id);
    expect(foundModified.givenName, 'yegreS');
    expect(foundModified.familyName, 'oknemitsU');
  }
  
  Future findOneTestCase() async {
  
negative.code:   expect(u.id, savedFound.id);
    expect(u.givenName, savedFound.givenName);
    expect(u.familyName, savedFound.familyName);
    expect(u.weight, savedFound.weight);
  
    // now lets change some properties for both instances
    savedFound.givenName = 'yegreS';
    savedFound.familyName = 'oknemitsU';
    savedFound.weight = 234.567;
  
    await savedFound.save();
  
  