public String anonymize(final ParseTree tree) {
    return build(tree);
  }
@Test
  public void describeStatementsShouldGetAnonymized() {
    Assert.assertEquals("DESCRIBE stream1 EXTENDED;",
        anon.anonymize("DESCRIBE my_stream EXTENDED;"));
    Assert.assertEquals("DESCRIBE STREAMS EXTENDED;",
        anon.anonymize("DESCRIBE STREAMS EXTENDED;"));
    Assert.assertEquals("DESCRIBE FUNCTION function;",
        anon.anonymize("DESCRIBE FUNCTION my_function;"));
    Assert.assertEquals("DESCRIBE CONNECTOR connector;",
        anon.anonymize("DESCRIBE CONNECTOR my_connector;"));
  }