tracker.py

class Tracker:
  slots: Dict[str, Any]

  def __init__(self, slots="", latest_message=None):
    self.slots = loads(slots)
    self.latest_message = latest_message

  def latest_message(self):
    return self.latest_message

  def get_slot(self, key):
    if key in self.slots.keys():
      return self.slots[key]

    return None