code: def inst_coll_manager(self) -> InstanceCollectionManager:
      return self._inst_coll_manager
  
imports: import asyncio
  from typing import Dict
  from gear import Database
  from gear.cloud_config import get_gcp_config
  from hailtop import aiotools
  from hailtop.aiocloud import aiogoogle
  from hailtop.utils import RateLimit, periodically_call
  from ....driver.driver import CloudDriver, process_outstanding_events
  from ....driver.instance_collection import InstanceCollectionManager, JobPrivateInstanceManager, Pool
  from ....inst_coll_config import InstanceCollectionConfigs
  from .activity_logs import process_activity_log_events_since
  from .billing_manager import GCPBillingManager
  from .disks import delete_orphaned_disks
  from .resource_manager import GCPResourceManager
  from .zones import ZoneMonitor
label_desc: Use image node_id 3 for calling the GCPDriver obj's underlying member method code with example usage: obj.inst_coll_manager() and returns: self