docs: @SuppressWarnings("unchecked")
      @Override
      protected void afterHandle(final Request request, final Response response)
      {
          super.afterHandle(request, response);
          
          final ConcurrentMap<String, Object> responseAttributes = response.getAttributes();
          
          Series<Header> responseHeaders = (Series<Header>)responseAttributes.get(HeaderConstants.ATTRIBUTE_HEADERS);
          
          if(responseHeaders == null)
          {
              responseHeaders = new Series<Header>(Header.class);
              final Series<Header> putIfAbsent =
                      (Series<Header>)responseAttributes.putIfAbsent(HeaderConstants.ATTRIBUTE_HEADERS, responseHeaders);
              
              if(putIfAbsent != null)
              {
                  responseHeaders = putIfAbsent;
              }
          }
          
          // Allow all origins
          responseHeaders.add("Access-Control-Allow-Origin", "*");
      }