virtual void exportData() const = 0;
};
-typedef struct _GtkToggleButton GtkToggleButton;
-typedef struct _GtkRadioButton GtkRadioButton;
-typedef struct _GtkSpinButton GtkSpinButton;
-typedef struct _GtkComboBox GtkComboBox;
-typedef struct _GtkEntry GtkEntry;
-typedef struct _GtkAdjustment GtkAdjustment;
template<typename FirstArgument>
class CallbackDialogData;