Creates a list of path of all selected rows.
Additionally, if you are planning on modifying the model after calling this function, you may want to convert the returned list into a list of `GtkTreeRowReference`s. To do this, you can use TreeRowReference.
To free the return value, use:
g_list_free_full (list, (GDestroyNotify) gtk_tree_path_free);
this |
A `GtkTreeSelection`. |
model |
A pointer to set to the `GtkTreeModel` |
A `GList` containing a `GtkTreePath` for each selected row. |