CachingResult result = performSkip(work, context);
        broadcastWorkInputs(work, true);
        return result;
    }

    abstract protected CachingResult performSkip(UnitOfWork work, C context);

    private CachingResult executeWithNonEmptySources(UnitOfWork work, C context) {
        broadcastWorkInputs(work, false);
        return delegate.execute(work, context);
    }