def METHOD_NAME():
    bytes_ = b"foobar"
    blob_id = hashlib.sha1(bytes_).hexdigest()
    image = Image(bytes=bytes_)
    list_ = [image] * 5
    summary, blobs = get_json_encodable_summary(list_, List[Image])
    assert summary == {
        "summary": [{"mime_type": "text/plain", "bytes": {"blob": blob_id}}] * 5,
        "length": 5,
    }
    assert blobs == {blob_id: bytes_}