anchor.diff:                      :drag-callback #'slider-updated-callback)
             (y-slider :slider
                       :value 0
  -                    :show-value t
  +                    :show-value-p nil
                       :orientation :horizontal
                       :min-value 0
                       :max-value 200
  
positive.code:                     :drag-callback #'slider-updated-callback)
            (scale-slider :slider
                          :value 1
                          :show-value t
                          :orientation :horizontal
                          :min-value 0.1
                          :max-value 5
  
negative.code:                       :drag-callback #'slider-updated-callback)
            (x-slider :slider
                      :value 0
                      :show-value-p nil
                      :orientation :horizontal
                      :min-value 0
                      :max-value 200
  