Gets the type of representation being used by the #GtkStatusIcon
to store image data. If the #GtkStatusIcon has no image data,
the return value will be %GTK_IMAGE_EMPTY.
Deprecated: Use #GNotification and #GtkApplication to
provide status notifications; there is no direct replacement
for this function, and #GNotification only supports #GIcon
instances
Gets the type of representation being used by the #GtkStatusIcon to store image data. If the #GtkStatusIcon has no image data, the return value will be %GTK_IMAGE_EMPTY.