private @NotNull List<Path> getSharedConfigurationFiles() {
    if (sharedConfigurationFiles == null) {
      if (dir == null) {
        sharedConfigurationFiles = Collections.emptyList();
      }
      else {
        sharedConfigurationFiles = MultiFilesSettings.getSettingsXmlFiles(dir);
      }
    }
    return sharedConfigurationFiles;
  }
private @NotNull List<Path> getSharedConfigurationFiles()