Creates Tensorflow Saver object with 3 recent checkpoints to keep.
    :param max_to_keep: Maximum number of recent checkpoints to keep, defaults to 3

def get_default_saver(max_to_keep: int=3) -> tf.train.Saver:
    """
    Creates Tensorflow Saver object with 3 recent checkpoints to keep.
    :param max_to_keep: Maximum number of recent checkpoints to keep, defaults to 3
    """
    return tf.train.Saver(max_to_keep=max_to_keep)