code: def test_catch_heterogeneous_exception(self):
      cameras = init_random_cameras(
          FoVPerspectiveCameras, 1, random_z=True
      )
  
      class FakeSampler:
          def __init__(self):
              self.min_x, self.max_x = 1, 2
              self.min_y, self.max_y = 1, 2
  
          def __call__(self, **kwargs):
              return HeterogeneousRayBundle(
                  torch.rand(3),
                  torch.rand(3),
                  torch.rand(3),
                  torch.rand(1),
              )
  
      with patch(
          "pytorch3d.implicitron.models.renderer.ray_sampler.NDCMultinomialRaysampler",
          return_value=FakeSampler(),
      ):
          for sampler in [
              AdaptiveRaySampler(cast_ray_bundle_as_cone=True),
              NearFarRaySampler(cast_ray_bundle_as_cone=True),
          ]:
              with self.assertRaises(TypeError):
                  _ = sampler(cameras, EvaluationMode.TRAINING)
          for sampler in [
              AdaptiveRaySampler(cast_ray_bundle_as_cone=False),
              NearFarRaySampler(cast_ray_bundle_as_cone=False),
          ]:
              _ = sampler(cameras, EvaluationMode.TRAINING)
  
imports: import unittest
  from itertools import product
  from typing import Tuple
  from unittest.mock import patch
  import torch
  from pytorch3d.common.compat import meshgrid_ij
  from pytorch3d.implicitron.models.renderer.base import EvaluationMode
  from pytorch3d.implicitron.models.renderer.ray_sampler import AdaptiveRaySampler, compute_radii, NearFarRaySampler
  from pytorch3d.renderer.cameras import CamerasBase, FoVOrthographicCameras, FoVPerspectiveCameras, OrthographicCameras, PerspectiveCameras
  from pytorch3d.renderer.implicit.utils import HeterogeneousRayBundle
  from tests.common_camera_utils import init_random_cameras
  from tests.common_testing import TestCaseMixin
label_desc: Use image node_id 2 for calling the TestRaysampler obj's underlying member method code with example usage: obj.test_catch_heterogeneous_exception() and returns: HeterogeneousRayBundle