         let target = processSections()
         
         // If any of the sections are collapsed we may need to adjust some of the edits
-        if !collapsedSections.isEmpty || defaultCollapse {
+        if !self.collapsedSections.isEmpty || self.defaultCollapse {
             var _collapsed = Set<Int>()
             for sec in target {
                 if let s = sec?.source, self.collapsedSections.contains(s),

            }
            // Ignore inserts for collapsed sections
            self.itemUpdates.inserted = self.itemUpdates.inserted.filter {
                return !self.collapsedSections.contains($0._section)
            }
            
            // Ignore inserts for collapsed sections

    }
    
    public func collapseSection(at sectionIndex: Int, animated: Bool) {
        guard !collapsedSections.contains(sectionIndex) else { return }
        let ips = (0..<self.numberOfItems(in: sectionIndex)).map { return IndexPath.for(item: $0, section: sectionIndex) }
        collapsedSections.insert(sectionIndex)
        self.collectionView.deleteItems(at: ips, animated: animated)
    }
    
    public func expandSection(at sectionIndex: Int, animated: Bool) {
        guard collapsedSections.remove(sectionIndex) != nil else { return }
        let ips = (0..<self.numberOfItems(in: sectionIndex)).map { return IndexPath.for(item: $0, section: sectionIndex) }
        self.collectionView.insertItems(at: ips, animated: animated)
    }
