gtkTreeModelRowsReordered: gtkTreeModelRowsReordered
In RGtk2: R Bindings for Gtk 2.8.0 and Above

Emits the "rows-reordered" signal on tree.model. This should be called by models when their rows have been reordered.

1	gtkTreeModelRowsReordered(object, path, iter, new.order)

`object`	A `GtkTreeModel`
`path`	A `GtkTreePath` pointing to the tree node whose children have been reordered
`iter`	A valid `GtkTreeIter` pointing to the node whose children have been reordered, or `NULL` if the depth of `path` is 0.
`new.order`	a list of integers mapping the current position of each child to its old position before the re-ordering, i.e. `new.order[newpos] = oldpos`.