def with_blob(self, blob):
        """
        Init Azure Blob Lease with existing blob.
        """
        content = json.loads(blob.content)
        self.partition_id = content["partition_id"]
        self.owner = content["owner"]
        self.token = content["token"]
        self.epoch = content["epoch"]
        self.offset = content["offset"]
        self.sequence_number = content["sequence_number"]
        self.event_processor_context = content.get("event_processor_context")
Init Azure Blob Lease with existing blob.