<% Story.discussions %>
macro renders a checkbox for enabling/disabling discussions for backwards compatibility this macro also renders a hidden input so that we can check if the checkbox is embedded in story/edit.skin

Sourcecode in Story/macros.js:
1:   function discussions_macro(param) {
2:      if (!path.Site.preferences.getProperty("discussions"))
3:         return;
4:      if (param.as == "editor") {
5:         var inputParam = this.createCheckBoxParam("discussions", param);
6:         if ((req.data.publish || req.data.save) && !req.data.discussions)
7:            delete inputParam.checked;
8:         Html.checkBox(inputParam);
9:      } else
10:        res.write(this.discussions ? getMessage("generic.yes") : getMessage("generic.no"));
11:     return;
12:  }