How to inherit MTSlideToOpenView?

[kevinlee-app]

Hello,

Recently i just install MTSlideToOpen pod and found out that it suits my use case. Since i have to customize this button i tried to create a class that inherit MTSlideToOpenView but i got this error Cannot inherit from non-open class 'MTSlideToOpenView' outside of its defining module

From my searching it is because MTSlideToOpenView is not open class. Is there any way to inherit MTSlideToOpenView?

I create a class like this:

class CustomSlidingButton: MTSlideToOpenView {

}