public String anonymize(final ParseTree tree) {
    return build(tree);
  }
@Test
  public void shouldAnonymizeExplainStatementCorrectly() {
    Assert.assertEquals("EXPLAIN query;", anon.anonymize("EXPLAIN my_query;"));
    Assert.assertEquals("EXPLAIN SELECT * FROM source1;",
        anon.anonymize("EXPLAIN SELECT * from S1;"));
  }