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(widget)radio-button-choice

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The `radio-button-choice' Widget
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   Syntax:

     TYPE ::= (radio-button-choice [KEYWORD ARGUMENT]...  TYPE ... )

   The TYPE argument represents each possible choice.  The widget's
value will be that of the chosen TYPE argument.  This widget will match
any value matching at least one of the specified TYPE arguments.

   The following extra properties are recognized.

`:entry-format'
     This string will be inserted for each entry in the list.  The
     following `%' escapes are available:
    `%v'
          Replace with the buffer representation of the TYPE widget.

    `%b'
          Replace with the radio button.

    `%%'
          Insert a literal `%'.

`:button-args'
     A list of keywords to pass to the radio buttons.  Useful for
     setting e.g. the `:help-echo' for each button.

`:buttons'
     The widgets representing the radio buttons.

`:children'
     The widgets representing each type.

`:choice'
     The current chosen type

`:args'
     The list of types.

   You can add extra radio button items to a `radio-button-choice'
widget after it has been created with the function
`widget-radio-add-item'.

 - Function: widget-radio-add-item widget type
     Add to `radio-button-choice' widget WIDGET a new radio button item
     of type TYPE.

   Please note that such items added after the `radio-button-choice'
widget has been created will *not* be properly destructed when you call
`widget-delete'.