code: def _add_deployment(self, deployment: str):
      if deployment not in self._deployments:
          self._deployments[deployment] = {"shards": {}, "heads": {}}
          self._access_count[deployment] = 0
  
file_path: jina/jina/serve/networking/connection_pool_map.py
imports: import os
  from typing import TYPE_CHECKING, Dict, List, Optional, Sequence
  from jina.logging.logger import JinaLogger
  from jina.serve.networking.instrumentation import _NetworkingHistograms, _NetworkingMetrics
  from jina.serve.networking.replica_list import _ReplicaList
label_desc: Use image node_id 7 for calling the _ConnectionPoolMap obj's underlying member method code with example usage: obj._add_deployment(deployment) without return types