If a sort function is set, the widget will actually be inserted
at the calculated position and this function has the same effect
as gtk_container_add().
If @position is -1, or larger than the total number of children
in the @box, then the @widget will be appended to the end.
Inserts the @widget into @box at @position.
If a sort function is set, the widget will actually be inserted at the calculated position and this function has the same effect as gtk_container_add().
If @position is -1, or larger than the total number of children in the @box, then the @widget will be appended to the end.