@Test
    void testStreamOfType() {
        assertEquals(0, instance.streamOf(String.class).count());
        assertEquals(degree, instance.streamOf(Integer.class).count());
    }
@author Per Minborg
@param <T> tuple of nullable type
common-parent/tuple/src/test/java/com/speedment/common/tuple/internal/nullable/AbstractTupleImplTest.java