Cannot inherit from non-open class 'ListSingleSectionController' outside of its defining module

error
Cannot inherit from non-open class 'ListSingleSectionController' outside of its defining module

Code

(I am new to IOS app development)

import Foundation
import IGListKit
import UIKit
import MobileBuySDK

class CartBottomSectionController: ListSingleSectionController, CompositionLayoutCapable {

func collectionViewSectionLayout(layoutEnvironment: NSCollectionLayoutEnvironment) -> NSCollectionLayoutSection? {
let estimation = NSCollectionLayoutDimension.estimated(200)
let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1),
heightDimension: estimation)
let item = NSCollectionLayoutItem(layoutSize: itemSize)

let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1),
heightDimension: estimation)
let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize,
subitems: [item])

let section = NSCollectionLayoutSection(group: group)

return section
}
}