public static String formatExpression(final Expression expression) {
    return formatExpression(expression, FormatOptions.of(s -> false));
  }
@Test
  public void shouldFormatMap() {
    final SqlMap map = SqlTypes.map(SqlTypes.INTEGER, SqlTypes.BIGINT);
    assertThat(ExpressionFormatter.formatExpression(new Type(map)),
        equalTo("MAP<INTEGER, BIGINT>"));
  }