public static @NotNull String getSystemPath() {
    String path = ourSystemPath;
    if (path == null) {
      String explicit = getExplicitPath(PROPERTY_SYSTEM_PATH);
      ourSystemPath = path = explicit != null ? explicit :
                             ourPathSelector != null ? getDefaultSystemPathFor(ourPathSelector) :
        getHomePath() + '/' + SYSTEM_DIRECTORY;
    }
    return path;
  }
public static @NotNull String getSystemPath()