Moves @child to a new @position in the list of @box children.
The list contains widgets packed #GTK_PACK_START
as well as widgets packed #GTK_PACK_END, in the order that these
widgets were added to @box.
A widget’s position in the @box children list determines where
the widget is packed into @box. A child widget at some position
in the list will be packed just after all other widgets of the
same packing type that appear earlier in the list.
Moves @child to a new @position in the list of @box children. The list contains widgets packed #GTK_PACK_START as well as widgets packed #GTK_PACK_END, in the order that these widgets were added to @box.
A widget’s position in the @box children list determines where the widget is packed into @box. A child widget at some position in the list will be packed just after all other widgets of the same packing type that appear earlier in the list.