code: def is_pinned(self, tensor):
      return tensor.is_pinned()
  
imports: import os
  import pkgutil
  import importlib
  import torch
  from .abstract_accelerator import DeepSpeedAccelerator
label_desc: Use image node_id 56 for calling the HPU_Accelerator obj's underlying member method code with example usage: obj.is_pinned(tensor) and returns: tensor