code: def __init__(
      self,
      device,
      entry_method_info=None,
      skip_between_cupy_devices=False,
      starting_device_resident=None,
  ):
      assert isinstance(device, chainer.backend.Device)
  
      # `entry_method_info` is for backward compatibility workaround for
      # overridden methods.
      # It indicates which method originally causes this visitor.
      # If it is any of the to_??? method names, descendant resident's
      # respective method will be called if it's overridden
      # (instead of `device_resident_accept`).
      if entry_method_info is not None:
          device_names = {
              "to_cpu": "@numpy",
              "to_gpu": "@cupy:N",
              "to_intel64": "@intel64",
          }
          assert len(entry_method_info) == 2
          method = entry_method_info[0]
          assert method in device_names
          warnings.warn(
              "{} is deprecated. "
              "Please use to_device('{}') instead.".format(
                  method, device_names[method]
              ),
              DeprecationWarning,
          )
  
      # starting_device_resident is also for backward compatibility
      # workaround for overridden methods.
      # It is a DeviceResident if to_xxx methods were initially called
      # on this visitor. This is used to avoid infinite accept-visit loop
      # that would occur by calling to_xxx methods.
      assert starting_device_resident is None or isinstance(
          starting_device_resident, DeviceResident
      )
  
      self._device = device
      self._entry_method_info = entry_method_info
      self._skip_between_cupy_devices = skip_between_cupy_devices
      self._starting_device_resident = starting_device_resident
  
imports: from __future__ import absolute_import
  import abc
  import sys
  import threading
  import typing
  import warnings
  import numpy
  import chainer
  from chainer import backend
  from chainer.backends import _cpu
  from chainer.backends import cuda
  from chainer.backends import intel64
  from chainer import types
  from chainer import utils
  import chainerx
label_desc: Use image node_id 1 to create a new _ToDeviceVisitor object from inherited base classes: DeviceResidentsVisitor with example: obj = _ToDeviceVisitor(device, entry_method_info, skip_between_cupy_devices, starting_device_resident)