title: Scroll collection view with button action
body: <p>I am having a collection view which shows 3 cells as visible. when i click the right arrow button, It should scroll to show the next 3 cells and when i click the left arrow button, It should scroll to show the previous 3 cells. In case if there is 2 cells behind, it should show those 2 cells with previous last visible cell.</p>
  
  <p>can someone help with it?</p>