code: def tile(cls, op):
      raise NotImplementedError(
          "Fetch tile cannot be handled by operand itself"
      )
  
file_path: mars/mars/core/operand/fetch.py
imports: import enum
  from ...None import opcodes
  from ...serialization.serializables import FieldTypes, StringField, ListField, Int32Field, ReferenceField
  from .base import Operand
  from .core import TileableOperandMixin
label_desc: Use image node_id 2 for calling the FetchMixin obj's underlying member method code with example usage: obj.tile(cls, op) without return types