Other ipums_api:
add_to_extract(),
define_extract_cps(),
define_extract_from_json(),
define_extract_usa(),
download_extract(),
extract_list_to_tbl(),
extract_tbl_to_list(),
get_extract_info(),
get_last_extract_info(),
get_recent_extracts_info,
is_extract_ready(),
remove_from_extract(),
save_extract_as_json(),
set_ipums_api_key(),
submit_extract(),
wait_for_extract()