docs: protected String getDiscoveryResponseURL(String entityBaseURL, String entityAlias) {
          if (extendedMetadata != null && extendedMetadata.getIdpDiscoveryResponseURL() != null
                  && extendedMetadata.getIdpDiscoveryResponseURL().length() > 0) {
              return extendedMetadata.getIdpDiscoveryResponseURL();
          } else {
              Map<String, String> params = new HashMap<String, String>();
              params.put(SAMLEntryPoint.DISCOVERY_RESPONSE_PARAMETER, "true");
              return getServerURL(entityBaseURL, entityAlias, getSAMLEntryPointPath(), params);
          }
      }