Why NVActivityIndicatorAnimationBlank dose not exist？

[Sfh03031]

`#if canImport(UIKit) import UIKit

class NVActivityIndicatorAnimationBlank: NVActivityIndicatorAnimationDelegate {

func setUpAnimation(in _: CALayer, size _: CGSize, color _: UIColor) {
    // Do nothing
}

} #endif`

[ninjaprox]

Could you explain why we need it?