public static String formatExpression(final Expression expression) {
    return formatExpression(expression, FormatOptions.of(s -> false));
  }
@Test
  public void shouldFormatSubscriptExpression() {
    assertThat(ExpressionFormatter.formatExpression(new SubscriptExpression(
            new StringLiteral("abc"),
            new IntegerLiteral(3))),
        equalTo("'abc'[3]"));
  }