abstractfactory

type Button interface {
	Press() string
}

type CircularButton struct{}

type CircularScrollBar struct{}

type CircularWidgetFactory struct{}

type ScrollBar interface {
	Scroll() string
}

type SquareButton struct{}

type SquareScrollBar struct{}

type SquareWidgetFactory struct{}

type WidgetFactory interface {
	NewButton() Button
	NewScrollBar() ScrollBar
}