ASCollectionNode show footer only for some sections

DashboardNode.swift

import AsyncDisplayKit

class DashboardNode: ASDisplayNode {
  private let collectionNode: ASCollectionNode

  init() {
    let collectionFlow = UICollectionViewFlowLayout()
    collectionNode = ASCollectionNode(collectionViewLayout: collectionFlow)

    super.init()

    automaticallyManagesSubnodes = true

    collectionNode.delegate = self
    collectionNode.dataSource = self
  }

  override func layoutSpecThatFits(_ constrainedSize: ASSizeRange) -> ASLayoutSpec {
    collectionNode.style.preferredSize = constrainedSize.max
    return ASAbsoluteLayoutSpec(children: [collectionNode])
  }

  deinit {
    print("✅ deinit DashboardNode")
  }
}

extension DashboardNode: ASCollectionDataSource, ASCollectionDelegate, ASCollectionDelegateFlowLayout {
  func numberOfSections(in collectionNode: ASCollectionNode) -> Int {
    return 10
  }

  func collectionNode(_ collectionNode: ASCollectionNode, numberOfItemsInSection section: Int) -> Int {
    return 10
  }

  func collectionNode(_ collectionNode: ASCollectionNode, nodeBlockForItemAt indexPath: IndexPath) -> ASCellNodeBlock {
    return {
      let node = ASTextCellNode()
      node.text = "\(indexPath.row)"
      node.backgroundColor = UIColor.lightGray
      return node
    }
  }

  func collectionNode(_ collectionNode: ASCollectionNode, constrainedSizeForItemAt indexPath: IndexPath) -> ASSizeRange {
    return ASSizeRangeMake(CGSize(width: collectionNode.calculatedSize.width, height: 44.0))
  }

  func collectionNode(_ collectionNode: ASCollectionNode, supplementaryElementKindsInSection section: Int) -> [String] {
    return [UICollectionElementKindSectionFooter]
  }

  func collectionNode(_ collectionNode: ASCollectionNode, nodeForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> ASCellNode {
    let node = ASTextCellNode()
    node.text = "Footer \(indexPath.section)"
    node.backgroundColor = UIColor.red
    return node
  }

  func collectionNode(_ collectionNode: ASCollectionNode, sizeRangeForFooterInSection section: Int) -> ASSizeRange {
    if section == 0 {
      return ASSizeRangeZero
    }
    return ASSizeRangeMake(CGSize(width: collectionNode.calculatedSize.width, height: 64.0))
  }

}