RinniSwift

class LRUCache<T: Hashable, U> {
  // ...
  
  /// Returns the element at the specified key. Nil if it doesn't exist.
    func retrieveObject(at key: T) -> U? {
        guard let existingNode = dictionary[key] else {
            return nil
        }

        linkedList.moveToHead(node: existingNode)

RinniSwift

let element = UIAccessibilityElement(accessibilityContainer: self)
element.accessibilityLabel = [titleLabel.text, subtitleLabel.text].compactmap { $0 }.joined(seperator: ", ")
element.accessibilityFrameInContainerSpace = titleLabel.frame.union(subtitleLabel.frame)

accessibilityElements = [element, bottomView, button].compactMap { $0 }

RinniSwift

let callAction = UIAccessibilityCustomAction(
  name: "Call",
  target: self,
  selector: #selector(callButtonPressed)
)

let emailAction = UIAccessibilityCustomAction(
  name: "Send email",
  target: self,
  selector: #selector(emailButtonPressed)