code: def _del_meta(self, object_id: str):
      meta = self._store[object_id]
      if isinstance(meta, _ChunkMeta):
          for band in meta.bands:
              chunks = self._band_chunks[band]
              chunks.remove(object_id)
              if len(chunks) == 0:
                  del self._band_chunks[band]
      del self._store[object_id]
  
file_path: mars/mars/services/meta/store/dictionary.py
imports: import functools
  from collections import defaultdict
  from dataclasses import fields
  from typing import Dict, List
  from ....None import oscar
  from ....lib.ordered_set import OrderedSet
  from ....utils import implements
  from ....typing import BandType
  from ..core import _CommonMeta, _ChunkMeta
  from .base import AbstractMetaStore, register_meta_store
label_desc: Use image node_id 4 for calling the DictMetaStore obj's underlying member method code with example usage: obj._del_meta(object_id) without return types