w->post_select = file_write_post_select;
w->post_select_btr = file_write_post_select_btr;
w->parse_config = file_write_parse_config;
w->post_select = file_write_post_select;
w->post_select_btr = file_write_post_select_btr;
w->parse_config = file_write_parse_config;