validate_render_arguments

# File actionpack/lib/action_controller/base.rb, line 1270
      def validate_render_arguments(options, extra_options, has_block)
        if options && (has_block && options != :update) && !options.is_a?(String) && !options.is_a?(Hash) && !options.is_a?(Symbol)
          raise RenderError, "You called render with invalid options : #{options.inspect}"
        end

        if !extra_options.is_a?(Hash)
          raise RenderError, "You called render with invalid options : #{options.inspect}, #{extra_options.inspect}"
        end
      end