code: def declare_shared_memory(
      self, previous_state: State
  ) -> Optional[AllocationQuery]:
      return None
  
file_path: ffcv/ffcv/pipeline/operation.py
imports: from abc import ABC, abstractmethod
  from typing import TYPE_CHECKING
  from typing import Callable, Optional, Tuple
  import numpy
  from .state import State
  from .allocation_query import AllocationQuery
label_desc: Use image node_id 5 for calling the Operation obj's underlying member method code with example usage: obj.declare_shared_memory(previous_state) and returns: None