@Nullable
  public Sdk getSelectedJdk() {
    String jdkName = getSelectedValue();
    Sdk jdk = null;
    try {
      jdk = ExternalSystemJdkUtil.resolveJdkName(myProjectJdk, jdkName);
    }
    catch (ExternalSystemJdkException ignore) {
    }
    return jdk;
  }
@Nullable
  public Sdk getSelectedJdk()