def get_bytes(self, index, size):
        """
        Extracts several bytes from a bitvector, where the index refers to the byte in a big-endian order

        :param index: the byte index at which to start extracting
        :param size: the number of bytes to extract
        :return: A BV of size ``size * 8``
        """
        pos = self.size() // 8 - 1 - index
        return self[pos * 8 + 7 : (pos - size + 1) * 8]
Extracts several bytes from a bitvector, where the index refers to the byte in a big-endian order

        :param index: the byte index at which to start extracting
        :param size: the number of bytes to extract
        :return: A BV of size ``size * 8``