insert_before
Description:
Inserts a new row before sibling.
Note:
Use [class@Gtk.TreeListModel] instead
If sibling is null, then the row will be appended to parent’s children.
If parent and sibling are null, then the row will be appended to the toplevel.
If both sibling and parent are set, then parent must be the parent of sibling. When
sibling is set, parent is optional.
The iter parameter will be changed to point to this new row. The row will be empty after this function is called. To fill in
values, you need to call @set or
set_value.
Parameters:
| this |
A `GtkTreeStore` |
| iter |
An unset `GtkTreeIter` to set to the new row |
| parent |
A valid `GtkTreeIter` |
| sibling |
A valid `GtkTreeIter` |