code: def setUp(self) -> None:
      super().setUp()
      torch.manual_seed(1)
  
imports: import unittest
  from collections import namedtuple
  import numpy
  import torch
  import torch.nn.functional
  from pytorch3d.loss import chamfer_distance
  from pytorch3d.structures.pointclouds import Pointclouds
  from .common_testing import get_random_cuda_device, TestCaseMixin
label_desc: Use image node_id 1 for calling the TestChamfer obj's underlying member method code with example usage: obj.setUp() without return types