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Checkbutton Methods

In addition to configure and cget, the following methods are supported by Checkbutton:

deselect: Sets the indicator to off.
select: Sets the indicator to on.
flash: Causes the button to flash from the normal to active state colors.
invoke: Invokes the callback command as if the checkbuttons were clicked.
toggle: Toggles the indicator from on to off, or from off to on.

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