@Nullable
  public File getGradleHomeFromEnvProperty(@Nullable Project project) {
    String path = System.getenv(GRADLE_ENV_PROPERTY_NAME);
    if (path == null) {
      return null;
    }
    File candidate = new File(path);
    return isGradleSdkHome(project, candidate) ? candidate : null;
  }
@Nullable
  public File getGradleHomeFromEnvProperty(@Nullable Project project)