Returns whether the resource exists locally, at `resource.path`.

def exists_locally(cls, path):
    """Returns whether the resource exists locally, at `resource.path`."""
    # If INFO file doesn't exist, consider resource does NOT exist, as it would
    # prevent guessing the `extract_method`.
    return (tf.io.gfile.exists(path) and
            tf.io.gfile.exists(_get_info_path(path)))