Create cached resource item
        :param path: str
        :param content: PIL.Image
        :return: str

def create_cached_item(self, path, content):
        """
        Create cached resource item
        :param path: str
        :param content: PIL.Image
        :return: str
        """
        if isinstance(content, Image.Image):
            f = tempfile.NamedTemporaryFile()
            content.save(f.name, format=content.format)

            item_path = '%s/%s' % (
                self.cache_folder,
                path.strip('/')
            )

            self.blob_service.create_blob_from_path(self.container_name, item_path, f.name)

            return self._generate_url(item_path)
        else:
            return False