DragGesture+Velocity.swift

// It is absolutely insane that velocity isn't public.
// INSANE.
// I don't get it.
// So anyway, this works but is kind of horrible.
// It's probably pretty safe to use and it should fallback to 0 if something goes wrong.
// Maybe.
extension DragGesture.Value {
    var secretVelocity: CGSize {
        let mirror = Mirror(reflecting: self)
        guard let velocity = mirror.children.first(where: { $0.label == "velocity" }) else {
            return .zero
        }

        let velocityMirror = Mirror(reflecting: velocity.value)
        guard let valuePerSecond = velocityMirror.children.first(where: { $0.label == "valuePerSecond" }) else {
            return .zero
        }
        
        guard let secretVelocity = valuePerSecond.value as? CGSize else {
            return .zero
        }
        
        return secretVelocity
    }
}