def process_planning_response(
      self,
      callback_context: CallbackContext,
      response_parts: List[types.Part],
  ) -> Optional[List[types.Part]]:
    """Processes the LLM response for planning.

    Args:
        callback_context: The callback context of the invocation.
        response_parts: The LLM response parts. Readonly.

    Returns:
        The processed response parts, or None if no processing is needed.
    """
    pass
Processes the LLM response for planning.

    Args:
        callback_context: The callback context of the invocation.
        response_parts: The LLM response parts. Readonly.

    Returns:
        The processed response parts, or None if no processing is needed.
    
src/google/adk/planners/base_planner.py