private static String tryConvertNumericLiteral(PsiElement expr, @NotNull PsiType type) {
    if (expr instanceof PsiLiteralExpression) {
      return PsiLiteralUtil.tryConvertNumericLiteral((PsiLiteralExpression)expr, type);
    }
    return null;
  }
private static String tryConvertNumericLiteral(PsiElement expr, @NotNull PsiType type)