code: def _get_bundle(self, *, device) -> ImplicitronRayBundle:
      origins = torch.rand(_BATCH_SIZE, _N_RAYS, 3, device=device)
      directions = torch.rand(_BATCH_SIZE, _N_RAYS, 3, device=device)
      lengths = torch.rand(
          _BATCH_SIZE, _N_RAYS, _N_POINTS_ON_RAY, device=device
      )
      bundle = ImplicitronRayBundle(
          lengths=lengths,
          origins=origins,
          directions=directions,
          xys=None,
          camera_ids=None,
          camera_counts=None,
      )
      return bundle
  
file_path: pytorch3d/tests/implicitron/test_srn.py
imports: import unittest
  import torch
  from pytorch3d.implicitron.models.generic_model import GenericModel
  from pytorch3d.implicitron.models.implicit_function.scene_representation_networks import SRNHyperNetImplicitFunction, SRNImplicitFunction, SRNPixelGenerator
  from pytorch3d.implicitron.models.renderer.ray_sampler import ImplicitronRayBundle
  from pytorch3d.implicitron.tools.config import get_default_args
  from pytorch3d.renderer import PerspectiveCameras
  from tests.common_testing import TestCaseMixin
label_desc: Use image node_id 3 for calling the TestSRN obj's underlying member method code with example usage: obj._get_bundle() and returns: bundle