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

[rajfrantic]

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
}

}