---

SELECT
    p.proname AS function_name,
    p.prosrc AS function_body
FROM pg_proc p
JOIN pg_namespace n
    ON n.oid = p.pronamespace
WHERE n.nspname = 'mail'
  AND p.proname IN (
      'api_new_message_group',
      'api_new_message_group_byte_file'
  )
ORDER BY p.proname;