code: def test_error():
      assert f_norm < 0.1
  
file_path: speechbrain/tests/integration/PLDA/example_plda_experiment.py
imports: import os
  import pickle
  import numpy
  from numpy import linalg
  from speechbrain.processing.PLDA_LDA import StatObject_SB
  from speechbrain.processing.PLDA_LDA import PLDA
  from speechbrain.processing.PLDA_LDA import Ndx
  from speechbrain.processing.PLDA_LDA import fast_PLDA_scoring
label_desc: Use image node_id 1 for calling a global function with example usage: test_error() without return types