docstr: Given a and b of shape (..., 3) each containing 3D vectors,
  assert that correspnding vectors are parallel. Changed sign is ok.
docstr_tok: ["Given","a","and","b","of","shape","(","...",",","3",")","each","containing","3D","vectors",",","assert","that","correspnding","vectors","are","parallel",".","Changed","sign","is","ok","."]
code: def _assertParallel(self, a, b, **kwargs):
      """
      Given a and b of shape (..., 3) each containing 3D vectors,
      assert that correspnding vectors are parallel. Changed sign is ok.
      """
      self.assertClose(
          torch.cross(a, b, dim=-1), torch.zeros_like(a), **kwargs
      )
  
file_path: pytorch3d/tests/implicitron/test_circle_fitting.py
imports: import unittest
  from math import pi
  import torch
  from pytorch3d.implicitron.tools.circle_fitting import _signed_area, fit_circle_in_2d, fit_circle_in_3d, get_rotation_to_best_fit_xy
  from pytorch3d.transforms import random_rotation, random_rotations
  from tests.common_testing import TestCaseMixin
label_desc: Use image node_id 2 for calling the TestCircleFitting obj's underlying member method code with example usage: obj._assertParallel(a, b) without return types