### Question:
RollbackImpl extends BaseFinishedStatement implements Rollback { @NotNull @Override public RollbackTransaction transaction() { return new RollbackTransactionImpl(this); }  @NotNull @Override RollbackTransaction transaction(); @NotNull @Override To to(); @NotNull @Override SavePoint to(@NotNull final String savePointName); @Override void prependTo(@NotNull final RawSqlBuilder builder); @Nullable @Override SqlPart previous();  }### Answer:
@Test public void transaction_returnsNotNullvalue() { RollbackImpl rollback = new RollbackImpl(); SqlPart result = rollback.transaction(); assertThat(result, is(notNullValue())); }