code: public File getStandaloneProfileConfigurationDirectory() {
          val file = environment.getProperty("cas.standalone.configurationDirectory", File.class);
          if (file != null && file.exists()) {
              LOGGER.trace("Received standalone configuration directory [{}]", file);
              return file;
          }
  
          return Arrays.stream(DEFAULT_CAS_CONFIG_DIRECTORIES)
              .filter(File::exists)
              .findFirst()
              .orElse(null);
      }
docs: Gets standalone profile configuration directory.
  
  @return the standalone profile configuration directory