Returns all user-defined metadata, standard HTTP properties,
        and system properties for the blob.

def blob_properties(self):
        """Returns all user-defined metadata, standard HTTP properties,
        and system properties for the blob.
        """
        if not self._blob_properties:
            self._blob_properties = self._blob_service.get_blob_properties(
                container_name=self._container_name,
                blob_name=self._blob_name)
        return self._blob_properties