selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
gtk_tree_selection_set_mode (selection, GTK_SELECTION_NONE);
gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
gtk_tree_selection_set_mode (selection, GTK_SELECTION_NONE);
gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);