Placing a margin around each edge of the UICollectionView

Question

When the UICollectionView is populated with items they always go right to the edges of the UICollectionView like so:

---------------
|X X X X X X X|
|X X X X         


        

Answer 1

Swift 4 updated (Vinayak Kini answer) :

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
    return UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
}