docs: @Override
      public Map<String, String> getChangedPropertiesMap(WebAppSecurityConfig original) {
          WebAppSecurityConfig globalConfig = WebAppSecurityCollaboratorImpl.getGlobalWebAppSecurityConfig();
          if (globalConfig != null) {
              return globalConfig.getChangedPropertiesMap(original);
          } else {
              return null;
          }
      }