MangaEx.MangaProviders.ProvidersBehaviour.download_pages

You're seeing just the callback download_pages, go back to MangaEx.MangaProviders.ProvidersBehaviour module for more information.
Link to this callback

download_pages(pages_url, manga_name, chapter, sleep)

Specs

download_pages(
  pages_url :: [String.t()],
  manga_name :: String.t(),
  chapter :: String.t() | integer(),
  sleep :: integer()
) :: list()