# File lib/simple_form/action_view_extensions/builder.rb, line 317
    def to_check_box_tag(options = {}, checked_value = "1", unchecked_value = "0")
      options = options.stringify_keys
      options["type"]     = "checkbox"
      options["value"]    = checked_value
      if options.has_key?("checked")
        cv = options.delete "checked"
        checked = cv == true || cv == "checked"
      else
        checked = self.class.check_box_checked?(value(object), checked_value)
      end
      options["checked"] = "checked" if checked
      if options["multiple"]
        add_default_name_and_id_for_value(checked_value, options)
        options.delete("multiple")
      else
        add_default_name_and_id(options)
      end
      hidden = unchecked_value ? tag("input", "name" => options["name"], "type" => "hidden", "value" => unchecked_value, "disabled" => options["disabled"]) : "".html_safe
      checkbox = tag("input", options)
      hidden + checkbox
    end