Sets the placement of the contents with respect to the scrollbars
for the scrolled window.
The default is %GTK_CORNER_TOP_LEFT, meaning the child is
in the top left, with the scrollbars underneath and to the right.
Other values in [enum@Gtk.CornerType] are %GTK_CORNER_TOP_RIGHT,
%GTK_CORNER_BOTTOM_LEFT, and %GTK_CORNER_BOTTOM_RIGHT.
See also [method@Gtk.ScrolledWindow.get_placement] and
[method@Gtk.ScrolledWindow.unset_placement].
Sets the placement of the contents with respect to the scrollbars for the scrolled window.
The default is %GTK_CORNER_TOP_LEFT, meaning the child is in the top left, with the scrollbars underneath and to the right. Other values in [enum@Gtk.CornerType] are %GTK_CORNER_TOP_RIGHT, %GTK_CORNER_BOTTOM_LEFT, and %GTK_CORNER_BOTTOM_RIGHT.
See also [method@Gtk.ScrolledWindow.get_placement] and [method@Gtk.ScrolledWindow.unset_placement].