code: @Override
      public String getFeatureAuthzRoleHeaderValue() {
          String name = null;
          WebAppConfig wac = getWebAppConfig();
          if (wac != null && wac instanceof WebAppConfiguration) {
              Dictionary<String, String> headers = ((WebAppConfiguration) wac).getBundleHeaders();
              if (headers != null)
                  name = headers.get("IBM-Authorization-Roles");
          }
          return name;
      }
docs: {@inheritDoc}