gboolean gtk_scrollable_get_border ( GtkScrollable* scrollable, GtkBorder* border )
Returns the size of a non-scrolling border around the outside of the scrollable. An example for this would be treeview headers. GTK+ can use this information to display overlayed graphics, like the overshoot indication, at the right position.
Available since: 3.16
Return location for the results.
The argument will be set by the function. The data is owned by the caller of the function.