WeChat.MiniProgram.Code.download

You're seeing just the function download, go back to WeChat.MiniProgram.Code module for more information.
Link to this function

download(file_path, create_fun)

Specs

download(file_path :: Path.t(), create_fun :: (() -> WeChat.response())) ::
  WeChat.response() | :ok | {:error, File.posix()}