CheckBox allows the user to choose one of only two possible options. It's similar to CheckButton in functionality, but it has a different appearance. To follow established UX patterns, it's recommended to use CheckBox when toggling it has no immediate effect on something. For example, it could be used when toggling it will only do something once a confirmation button is pressed.
See also BaseButton which contains common properties and methods associated with this node.
When BaseButton.button_group specifies a ButtonGroup, CheckBox changes its appearance to that of a radio button and uses the various radio_*
theme properties.