anchor.diff:      } else if (element.tagName.name == 'switch') {
         renderSwitch(element, buffer, childScope, html5);
         return;
  +    } else if (element.tagName.name == 'element') {
  +      registerCustomElement(element, buffer, childScope, html5);
  +      return;
       }
   
       buffer..write('<')..write(element.tagName.name);
  
positive.code:           element.tagName2,
            element.gt2);
  
      for (var item in attribute.value.compute(scope)) {
        var childScope = scope.createChild(values: {alias: item});
        renderElement(strippedElement, buffer, childScope, html5);
      }
    }
  
negative.code: 
      var asAttribute = element.attributes
          .firstWhere((a) => a.name == 'as', orElse: () => null);
      var indexAsAttribute = element.attributes
          .firstWhere((a) => a.name == 'index-as', orElse: () => null);
      var alias = asAttribute?.value?.compute(scope) ?? 'item';
      var indexAs = indexAsAttribute?.value?.compute(scope)?.toString() ?? 'item';
      var otherAttributes =
          element.attributes.where((a) => a.name != 'for-each' && a.name != 'as');
      Element strippedElement;
  