Record attribute default value by function call

attr_default_value

# compilation fails (function blank/0 undefined)
defmodule RDF do
  defmodule Util do
    def blank do
      "_:1"
    end
  end

  def blank do
    "_:1"
  end

  defrecord Triple, subject: blank #, predicate: blank, object: blank
end

# all good
defmodule RDF do
  defmodule Util do
    def blank do
      "_:1"
    end
  end

  def blank do
    "_:1"
  end

  defrecord Triple, subject: Util.blank #, predicate: blank, object: blank
end