long capacity()
    {
        return capacity;
    }
@Test
    void shouldAllowMultipleInstancesForSameStream()
    {
        try (Catalog catalog = new Catalog(archiveDir, clock))
        {
            assertEquals(CAPACITY, catalog.capacity());
            final long newRecordingId = newRecording();
            assertNotEquals(recordingOneId, newRecordingId);
        }
    }