load_once_path?

# File activesupport/lib/active_support/dependencies.rb, line 423
    def load_once_path?(path)
      # to_s works around a ruby1.9 issue where String#starts_with?(Pathname)
      # will raise a TypeError: no implicit conversion of Pathname into String
      autoload_once_paths.any? { |base| path.starts_with? base.to_s }
    end