     |> Enum.filter(&(&1 != field))
   end
 
-  defp alter_fn(record, fields_before, fields_after) do
+  # TODO
+  defp alter_fn(record, _fields_before, _fields_after) do
     record
   end
 

defmodule Ecto.Mnesia.Storage.Migrator do
  alias Ecto.Mnesia.Table
  alias :mnesia, as: Mnesia


  end

  defp do_create_table(table, attributes) do
    # TODO: read nodes from config
    case Mnesia.create_table(table, [attributes: attributes, disc_copies: [Kernel.node()]]) do
      {:atomic, :ok} ->
        Mnesia.wait_for_tables([table], 1_000)
