<% Site.modulePreferences %>
macro checks if there are any modules present and if they need to be included in the system setup page

Sourcecode in Site/macros.js:
1:   function modulePreferences_macro(param) {
2:      for (var i in app.modules)
3:         this.applyModuleMethod(app.modules[i], "renderPreferences", param);
4:      return;
5:   }