gboolean gtk_tree_model_get_iter_first ( GtkTreeModel* tree_model, GtkTreeIter* iter )
iter with the first iterator in the tree
(the one at the path “0”).
FALSE if the tree is empty,
Deprecated since: 4.10
Please do not use it in newly written code.
The argument will be set by the function. The data is owned by the caller of the function.