public String anonymize(final ParseTree tree) {
    return build(tree);
  }
@Test
  public void shouldAnonymizeDropStatementsCorrectly() {
    Assert.assertEquals("DROP STREAM IF EXISTS stream1 DELETE TOPIC;",
        anon.anonymize("DROP STREAM IF EXISTS my_stream DELETE TOPIC;"));
    Assert.assertEquals("DROP TABLE IF EXISTS table1 DELETE TOPIC;",
        anon.anonymize("DROP TABLE IF EXISTS my_table DELETE TOPIC;"));
    Assert.assertEquals("DROP CONNECTOR IF EXISTS connector;",
        anon.anonymize("DROP CONNECTOR IF EXISTS my_connector;"));
    Assert.assertEquals("DROP TYPE IF EXISTS type;",
        anon.anonymize("DROP TYPE IF EXISTS my_type;"));
  }