freed with [glib.list.List.free], the contents of the list are owned by GTK+ and should not be freed.
Device.listSlaveDevices
gdk.device.Device[] listSlaveDevices()If the device if of type [gdk.types.DeviceType.Master], it will return the list of slave devices attached to it, otherwise it will return null
Returns
the list of slave devices, or null. The list must be