The `HdySwipeGroup` object can be used to sync multiple swipeable widgets that implement the [iface@Swipeable] interface, such as [
class@Carousel], so that animating one of them also animates all the other widgets in the group.
This can be useful for syncing widgets between a window's titlebar and content area.
HdySwipeGroup as GtkBuildable
`HdySwipeGroup` can be created in an UI definition. The list of swipeable widgets is specified with a <swipeables> element
containing multiple <swipeable> elements with their ”name” attribute specifying the id of the widgets.
`HdySwipeGroup` has been deprecated, [class@Window] and [class@ApplicationWindow] allow using a single leaflet for both content and
header bar, without the need to sync them.