code: @Override
      public Object getAttribute(String name, ServletRequest request) {
          if (this.isServletContainerManagedAttribute(name)) {
              return request.getAttribute(name);
          }
          return null;
      }
docs: /*
  (non-Javadoc)
  @see org.apache.pluto.container.PortletRequestContext#getAttribute(java.lang.String, javax.servlet.ServletRequest)