public static String formatExpression(final Expression expression) {
    return formatExpression(expression, FormatOptions.of(s -> false));
  }
@Test
  public void shouldFormatIsNullPredicate() {
    assertThat(ExpressionFormatter.formatExpression(new IsNullPredicate(new StringLiteral("name"))),
        equalTo("('name' IS NULL)"));
  }