public static Builder newChangesetBuilder() {
    return new Builder();
  }
@Test
  public void test_to_string() {
    Changeset underTest = Changeset.newChangesetBuilder()
      .setAuthor("john")
      .setDate(123456789L)
      .setRevision("rev-1")
      .build();

    assertThat(underTest).hasToString("Changeset{revision='rev-1', author='john', date=123456789}");
  }