gtk_tree_view_column_pack_start(col, renderer, TRUE);
gtk_tree_view_column_set_expand(col, TRUE);
gtk_tree_view_column_add_attribute(col, renderer, "text", index);
gtk_tree_view_column_pack_start(col, renderer, TRUE);
gtk_tree_view_column_set_expand(col, TRUE);
gtk_tree_view_column_add_attribute(col, renderer, "text", index);