SmbSessionImpl session = newSession();
        String s = session.toString();
        assertTrue(s.contains("targetHost=server.example"));
        assertTrue(s.contains("targetDomain=EXAMPLE"));
    }

    @Test
    @DisplayName("getExpiration: null when unset, value when positive")
    void testGetExpiration() {
        SmbSessionImpl session = newSession();
        assertNull(session.getExpiration());

        list of configs for the underlying layers.

## Bug Fixes and Other Changes

*   C++:
    *   Changed the signature of SessionFactory::NewSession so that it can
        return a meaningful error message on failure.
*   tf.data:
    *   Remove `num_parallel_parser_calls` argument from
        `tf.contrib.data.make_csv_dataset()`. [tf.data] Remove