def load_content(self, account_id, urls):
        """Prefetches one or more URLs to the CDN edge nodes.

        :param int account_id: the CDN account ID into which content should be
                               preloaded.
        :param urls: a string or a list of strings representing the CDN URLs
                     that should be pre-loaded.
        :returns: true if all load requests were successfully submitted;
                  otherwise, returns the first error encountered.
        """

        if isinstance(urls, six.string_types):
            urls = [urls]

        for i in range(0, len(urls), MAX_URLS_PER_LOAD):
            result = self.account.loadContent(urls[i:i + MAX_URLS_PER_LOAD],
                                              id=account_id)
            if not result:
                return result

        return True