Add cc to ghost trainer

ml-agents/mlagents/trainers/behavior_id_utils.py

-from typing import NamedTuple
+from typing import NamedTuple, Optional
 from urllib.parse import urlparse, parse_qs
 
 
         )
 
 
-def create_name_behavior_id(name: str, team_id: int) -> str:
+def create_name_behavior_id(
+    name: str, team_id: Optional[int] = None, group_id: Optional[int] = None
+) -> str:
+    """
+    Reconstructs fully qualified behavior name from name and team_id
+    :param name: brain name
+    :param team_id: team ID
+    :return: name_behavior_id
-   Reconstructs fully qualified behavior name from name and team_id
-   :param name: brain name
-   :param team_id: team ID
-   :return: name_behavior_id
-   """
-    return name + "?team=" + str(team_id)
+    final_name = name
+    if team_id is not None:
+        final_name += f"?team={team_id}"
+    if group_id is not None:
+        final_name += f"&group={group_id}"
+    return final_name
 
 
 def get_global_agent_id(worker_id: int, agent_id: int) -> str:

ml-agents/mlagents/trainers/ghost/trainer.py

         :param parsed_behavior_id: Behavior ID that the policy should belong to.
         :param policy: Policy to associate with name_behavior_id.
         """
-        name_behavior_id = parsed_behavior_id.behavior_id
-        self._name_to_parsed_behavior_id[name_behavior_id] = parsed_behavior_id
+        name_behavior_id = create_name_behavior_id(
+            parsed_behavior_id.brain_name, team_id=parsed_behavior_id.team_id
+        )
+        # Add policy only based on the team id, not the group id
+        self._name_to_parsed_behavior_id[
+            parsed_behavior_id.behavior_id
+        ] = parsed_behavior_id
         self.policies[name_behavior_id] = policy
 
     def get_policy(self, name_behavior_id: str) -> Policy:
         :return: Policy associated with name_behavior_id
         """
+        parsed_behavior_id = BehaviorIdentifiers.from_name_behavior_id(name_behavior_id)
+        name_behavior_id = create_name_behavior_id(
+            parsed_behavior_id.brain_name, team_id=parsed_behavior_id.team_id
+        )
         return self.policies[name_behavior_id]
 
     def _save_snapshot(self) -> None: