Sets a GtkImage to show a GdkPixbuf.
See [ctor@Gtk.Image.new_from_pixbuf] for details.
Note: This is a helper for [method@Gtk.Image.set_from_paintable], and you can't get back the exact pixbuf once this is called, only a paintable.
a GdkPixbuf or NULL
See Implementation
Sets a GtkImage to show a GdkPixbuf.
See [ctor@Gtk.Image.new_from_pixbuf] for details.
Note: This is a helper for [method@Gtk.Image.set_from_paintable], and you can't get back the exact pixbuf once this is called, only a paintable.