Please enable override func for open and close arrow image

[DaraChanis]

` open func open() {
self.isOpen = true
self.initialExpansionAllowed = false
if highlightAnimation == .animated {
UIView.animate(withDuration: 0.1) {[weak self] in
self?.arrowImageView.layer.transform = CATransform3DMakeRotation(CGFloat(Double.pi), 1.0, 0.0, 0.0)
}
}
}

open func close() {
    self.isOpen = false
    if highlightAnimation == .animated {
        UIView.animate(withDuration: 0.1) {[weak self] in
            self?.arrowImageView.layer.transform = CATransform3DMakeRotation(CGFloat(Double.pi), 0.0, 0.0, 0.0)
        }
    }
}`