* @tree_model: A #GtkTreeModel.
* @iter: The #GtkTreeIter.
* @column: The column to lookup the value at.
- * @value: An empty #GValue to set.
+ * @value: (inout) (transfer none) An empty #GValue to set.
*
* Initializes and sets @value to that at @column.
* When done with @value, g_value_unset() needs to be called
* gtk_tree_store_set_column_types:
* @tree_store: A #GtkTreeStore
* @n_columns: Number of columns for the tree store
- * @types: An array of #GType types, one for each column
+ * @types: (array length=n_columns): An array of #GType types, one for each column
*
* This function is meant primarily for #GObjects that inherit from
* #GtkTreeStore, and should only be used when constructing a new