protected boolean tryProcess0(@Nonnull Object item) throws Exception {
        return tryProcess(0, item);
    }
@Test
    public void when_tryProcess0_then_delegatesToTryProcess() throws Exception {
        // When
        boolean done = p.tryProcess0(MOCK_ITEM);

        // Then
        assertTrue(done);
        p.validateReceptionOfItem(ORDINAL_0, MOCK_ITEM);
    }