Hello,

I am studying《Build Your Own Web Framework in Elixir》, In about chapter 7 when I follow the book write code like this:

  def render(view_module, conn, file, assigns) do
    functions = view_module.__info__(:functions)

    contents =
      file
      |> html_file_path()
      |> EEx.eval_file([assigns: assigns], functions: [{view_module, functions}])

    Controller.render(conn, :html, contents)
  end

I get a warning: warning: :functions option in eval is deprecated, and I checked the official document EEx.html#module-options, which doesn’t have functions options, I also check Elixir version before v1.10.0, also don’t have this option, my question is:

1. In EEx.eval_file if I want to pass a functions option, what should I do?
2. Where does the functions option come from at the beginning? seems the document never wrote about this option, so how does the author of this book know this?