radiobuttons_element.RdA radio button group that allows a user to choose one item from a list of possible options.
radiobuttons_element(id, options, initial_option = NULL, confirm = NULL)
| id | character, An identifier for the action triggered when the radio button group is changed. | 
|---|---|
| options | list, a list of block_options. | 
| initial_option | An option_block that exactly matches one of the options within options, Default: NULL | 
| confirm | block_confirm, defines an optional confirmation dialog after the button is clicked. Default: NULL | 
block element class
Works with block types: Section, Actions, Input
Other elements: 
button_element(),
checkbox_element(),
datepicker_element(),
image_element(),
overflow_menu(),
plaintext_element(),
select_menu(),
select_type_menu()