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(use-package :jupyter-widgets)
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(progn
    (defvar a-button (make-instance 'button :description "Click me"))

    (defmethod on-button-click ((w (eql a-button)))
        (setf (widget-description w) "I've been clicked."))

    a-button)
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(progn
    (defvar a-int-slider (make-instance 'int-slider))
    a-int-slider)
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(widget-value a-int-slider)
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(setf (widget-value a-int-slider) 10)
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(setf (widget-orientation a-int-slider) "vertical")
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a-int-slider
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