def read(self, size=sys.maxsize):
        """Read at most size bytes from the file (less if the read hits EOF
        before obtaining size bytes).
        """
        blob_size = int(self.blob_properties.get('content-length'))
        if self._pointer < blob_size:
            chunk = self._download_chunk_with_retries(
                chunk_offset=self._pointer, chunk_size=size)
            self._pointer += size
            return chunk
Read at most size bytes from the file (less if the read hits EOF
        before obtaining size bytes).