public void DublicateUndo()
        {
            const string code = @"int ione
                                  ione = 5
                                  int itwo
                                  itwo = 2
                                  int three
                                  int four
                                  int five";
            var commands = GenerateCommands(code);
            var mutation=new DublicateCommandMutation(new Random(),commands);

            mutation.Transform();
            mutation.Undo();

            var assertCommands = GenerateCommands(code);
            Assert.IsTrue(AreCollectionsEquals(commands, assertCommands));
        }