public int initialTermId()
    {
        return initialTermId;
    }
@Test
    void shouldOverrideInitialTermId()
    {
        final int initialTermId = -178;
        final int newInitialTermId = 871;
        final Header header = new Header(initialTermId, 3);
        assertEquals(initialTermId, header.initialTermId());

        header.initialTermId(newInitialTermId);
        assertEquals(newInitialTermId, header.initialTermId());
    }