public SameFieldsValuesCopyCommandImpl(BuiltInTypesEqualityComparer compare)
        {
            if (compare == null)
            {
                throw new ArgumentNullException(nameof(compare));
            }

            this.compare = compare;
        }
 public void setUp()
 {
     this.compare = new BuiltInTypesEqualityComparerImpl();
 }