@Nullable
  public static String getStringValue(@Nullable PsiElement o) {
    if (o == null) {
      return null;
    }
    if (o instanceof PyStringLiteralExpression literalExpression) {
      return literalExpression.getStringValue();
    }
    else {
      return o.getText();
    }
  }
@Nullable
  public static String getStringValue(@Nullable PsiElement o)