Call ImgDoc.steal_page() instead

def _steal_content(self, other_page):
        """
        Call ImgDoc.steal_page() instead
        """
        other_doc = other_page.doc
        other_doc_pages = other_doc.pages[:]
        other_doc_nb_pages = other_doc.nb_pages
        other_page_nb = other_page.page_nb

        to_move = [
            (other_page.__get_box_path(), self.__get_box_path()),
            (other_page.__get_img_path(), self.__get_img_path()),
            (other_page._get_thumb_path(), self._get_thumb_path())
        ]
        for (src, dst) in to_move:
            # sanity check
            if self.fs.exists(dst):
                logger.error("Error, file already exists: %s" % dst)
                assert(0)
        for (src, dst) in to_move:
            logger.info("%s --> %s" % (src, dst))
            self.fs.rename(src, dst)

        if (other_doc_nb_pages <= 1):
            other_doc.destroy()
        else:
            for page_nb in range(other_page_nb + 1, other_doc_nb_pages):
                page = other_doc_pages[page_nb]
                page.change_index(offset=-1)