code: def merge_from(self, value: "_ChunkMeta"):
      if value.bands:
          self.bands = list(set(self.bands) | set(value.bands))
      if value.object_refs:
          self.object_refs = list(
              set(self.object_refs) | set(value.object_refs)
          )
      return self
  
file_path: mars/mars/services/meta/core.py
imports: from dataclasses import dataclass
  from typing import Any, Dict, List, Tuple, Union, Type
  import numpy
  import pandas
  from ...typing import BandType
  from ...utils import dataslots, TypeDispatcher
label_desc: Use image node_id 1 for calling the _ChunkMeta obj's underlying member method code with example usage: obj.merge_from(value) and returns: self