code: def latest(self) -> str:
      assert self._sorted, "Must sort versions to find latest."
      latest = self._versions[0]["version"]
      assert isinstance(latest, str)  # Hint for mypy.
      return latest
  
file_path: GPflow/doc/update_versions.py
imports: import argparse
  import json
  from pathlib import Path
  from typing import Any, List, Mapping, Optional
  from packaging.version import Version
  from versions import Branch
label_desc: Use image node_id 7 for calling the _Versions obj's underlying member method code with example usage: obj.latest() and returns: latest