def get_object_store_cfg(bucket, s3_index):
    """
    Create the bare minimum to successfully instantiate AWSObjectStore.

    Args:
        bucket (str): S3 bucket name.
        s3_index (str): Name of the DynamoDB S3 index table.

    Returns:
        (dict):
    """
    return {
        'id_count_table': 'foo',
        'page_in_lambda_function': 'foo',
        'id_index_table': 'foo',
        'cuboid_bucket': bucket,
        's3_index_table': s3_index,
        'page_out_lambda_function': 'foo',
        's3_flush_queue': 'foo'
    }