RadioButton
Description:
[ CCode ( has_construct_function = false ,  type = "GtkWidget*" ) ]
public RadioButton (SList<RadioButton>? group)
  public RadioButton (SList<RadioButton>? group)
Creates a new RadioButton.
To be of any practical value, a widget should then be packed into the radio button.
Parameters:
| group | an existing radio button group, or null if you are creating a new group. | 
Returns:
| a new radio button |