docs: @Override
      public Object getAttribute(String name) {
          if (name.startsWith(IPortletRenderer.RENDERER_ATTRIBUTE_PREFIX)) {
              return null;
          }
  
          final Object attribute = this.attributes.get(name);
          if (attribute != null) {
              return attribute;
          }
  
          if (name.startsWith(AbstractHttpServletRequestWrapper.PORTAL_ATTRIBUTE_PREFIX)) {
              Object result = this.servletRequest.getAttribute(name);
              return result;
          }
  
          if (name.equals(PortletRequest.RENDER_PART)) {
              Object result = this.servletRequest.getAttribute(name);
              return result;
          }
  
          return this.requestAttributeService.getAttribute(
                  this.servletRequest, portletWindow.getPlutoPortletWindow(), name);
      }