@set

Sets the value of one or more cells in the row referenced by iter.

The variable argument list should contain integer column numbers, each column number followed by the value to be set.

The list is terminated by a value of `-1`.

For example, to set column 0 with type `G_TYPE_STRING` to “Foo”, you would write

```c gtk_tree_store_set (store, iter, 0, "Foo", -1); ```

The value will be referenced by the store if it is a `G_TYPE_OBJECT`, and it will be copied if it is a `G_TYPE_STRING` or `G_TYPE_BOXED`.

Parameters:

this	A `GtkTreeStore`
iter	A valid `GtkTreeIter` for the row being modified
...	pairs of column number and value, terminated with -1