code: def adjust_free_cores_in_memory(self, delta_mcpu):
      self.inst_coll.adjust_for_remove_instance(self)
      self._free_cores_mcpu += delta_mcpu
      self.inst_coll.adjust_for_add_instance(self)
  
imports: import base64
  import json
  import logging
  import secrets
  from typing import Dict, Optional
  import aiohttp
  from gear import Database, transaction
  from hailtop import httpx
  from hailtop.humanizex import naturaldelta_msec
  from hailtop.utils import retry_transient_errors, time_msecs, time_msecs_str
  from ..cloud.utils import instance_config_from_config_dict
  from ..globals import INSTANCE_VERSION
  from ..instance_config import InstanceConfig
label_desc: Use image node_id 10 for calling the Instance obj's underlying member method code with example usage: obj.adjust_free_cores_in_memory(delta_mcpu) without return types