Check if the next pages where sliced.
        
        Example:
        >>> map(lambda i: _SlicedPaginator(i, 6, 3).hidden_next_pages(), range(1, 7))
        [True, True, True, True, False, False]
        >>> map(lambda i: _SlicedPaginator(i, 7, 3).hidden_next_pages(), range(1, 8))
        [True, True, True, True, True, False, False]
        >>> map(lambda i: _SlicedPaginator(i, 6, 5).hidden_next_pages(), range(1, 7))
        [True, True, True, False, False, False]
        >>> map(lambda i: _SlicedPaginator(i, 7, 5).hidden_next_pages(), range(1, 8))
        [True, True, True, True, False, False, False]

def hidden_next_pages(self):
        """Check if the next pages where sliced.
        
        Example:
        >>> map(lambda i: _SlicedPaginator(i, 6, 3).hidden_next_pages(), range(1, 7))
        [True, True, True, True, False, False]
        >>> map(lambda i: _SlicedPaginator(i, 7, 3).hidden_next_pages(), range(1, 8))
        [True, True, True, True, True, False, False]
        >>> map(lambda i: _SlicedPaginator(i, 6, 5).hidden_next_pages(), range(1, 7))
        [True, True, True, False, False, False]
        >>> map(lambda i: _SlicedPaginator(i, 7, 5).hidden_next_pages(), range(1, 8))
        [True, True, True, True, False, False, False]
        """
        next_pages = self.next_pages()
        return len(next_pages) > 0 and next_pages[-1] < self.npages