title: How to add two collection view cell by indexPath?
body: <p>Lets say we got 4 collection view cells like this : </p>
  
  <p><a href="https://i.stack.imgur.com/0LICL.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0LICL.png" alt="What I have"></a></p>
  
  <p>If I am going to replace two collection view cell at cell 3 and cell 4 position like this : </p>
  
  <p><a href="https://i.stack.imgur.com/SWujm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SWujm.png" alt="What I want"></a></p>
  
  <p>As you can see,cell 3 and cell 4 goes down and new cell 1 and cell 2 replace their position.</p>
  
  <p>Is there any way that I can do that at UICollectionView?</p>
  
  <p>I am beginner at using <code>UICollectionView</code> because all my app development is full of tableview usage.So,I want to learn more.</p>
  
  <p>Any Code help is appreciated.GitHub repo of example will be more appreciated.</p>
  
  <p>Thanks.</p>