public static @Nullable Path getExternalConfigurationDirectoryFromSystemProperty() {
    String externalProjectConfigDir = System.getProperty("external.project.config");
    return externalProjectConfigDir != null && !externalProjectConfigDir.isBlank() 
                                          ? Path.of(externalProjectConfigDir) : null;
  }
public static @Nullable Path getExternalConfigurationDirectoryFromSystemProperty()