@NotNull
  public static synchronized PropertiesFile getSystemProperties(@NotNull Project project) {
    PropertiesFile systemPropertiesFile = project.getUserData(SYSTEM_PROPERTIES_KEY);
    if (systemPropertiesFile == null) {
      project.putUserData(SYSTEM_PROPERTIES_KEY, systemPropertiesFile = createPropertiesFile(project, System.getProperties(), "system"));
    }
    return systemPropertiesFile;
  }
@NotNull
  public static synchronized PropertiesFile getSystemProperties(@NotNull Project project)