code: def test_get_internal_loss(self):
      loss = self.model.get_internal_loss()
      self.assertAlmostEqual(loss.item(), 0.6)
  
imports: import unittest
  import numpy
  import numpy.testing
  import torch
  import os
  import sys
  from collections import defaultdict
  from omegaconf import DictConfig
  from torch_points3d.models.base_model import BaseModel, BaseInternalLossModule
  from torch_points3d.modules.PointNet.modules import PointNetSTN3D
label_desc: Use image node_id 3 for calling the TestInternalLosses obj's underlying member method code with example usage: obj.test_get_internal_loss() without return types