code: function (content) {
    checkRenderContent(content);
  
    if (content instanceof Blaze.Template) {
      return content.constructView();
    } else if (content instanceof Blaze.View) {
      return content;
    } else {
      var func = content;
      if (typeof func !== 'function') {
        func = function () {
          return content;
        };
      }
      return Blaze.View('render', func);
    }
  }
docs: For Blaze.render and Blaze.toHTML, take content and wrap it in a View, unless it's a single View or Template already.