-/**
- * GtkBoxChild:
- * @widget: the child widget, packed into the GtkBox.
- * @padding: the number of extra pixels to put between this child and its
- * neighbors, set when packed, zero by default.
- * @expand: flag indicates whether extra space should be given to this child.
- * Any extra space given to the parent GtkBox is divided up among all children
- * with this attribute set to %TRUE; set when packed, %TRUE by default.
- * @fill: flag indicates whether any extra space given to this child due to its
- * @expand attribute being set is actually allocated to the child, rather than
- * being used as padding around the widget; set when packed, %TRUE by default.
- * @pack: one of #GtkPackType indicating whether the child is packed with
- * reference to the start (top/left) or end (bottom/right) of the GtkBox.
- * @is_secondary: %TRUE if the child is secondary
- *
- * The #GtkBoxChild holds a child widget of #GtkBox and describes how the child
- * is to be packed into the #GtkBox. All fields of this #GtkBoxChild should be
- * considered read-only and they should never be set directly by an application.
- * Use gtk_box_query_child_packing() and gtk_box_set_child_packing() to query
- * and set the #GtkBoxChild.padding, #GtkBoxChild.expand, #GtkBoxChild.fill and
- * #GtkBoxChild.pack fields.
- */
-struct _GtkBoxChild
-{
- GtkWidget *widget;
- guint16 padding;
- guint expand : 1;
- guint fill : 1;
- guint pack : 1;
- guint is_secondary : 1;
+ /* Padding for future expansion */
+ void (*_gtk_reserved1) (void);
+ void (*_gtk_reserved2) (void);
+ void (*_gtk_reserved3) (void);
+ void (*_gtk_reserved4) (void);