A variant of set_valist which takes the columns and values as two arrays, instead of varargs.
This function is mainly intended for language-bindings and in case the number of columns to change is not known until run-time.
| this |
A `GtkListStore` |
| iter |
A valid `GtkTreeIter` for the row being modified |
| columns |
an array of column numbers |
| values |
an array of GValues |
| n_values |
the length of the |