code: def running_under_guitar():
      # The Guitar build sets --test_env=TFP_GUITAR=1
      return bool(int(os.environ.get("TFP_GUITAR", 0)))
  
imports: import contextlib
  import os
  import re
  import traceback
  import unittest
  import hypothesis
  from hypothesis.extra import numpy
  import hypothesis.strategies
  import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import dtype_util
  from tensorflow_probability.python.internal import tensorshape_util
  from tensorflow_probability.python.util.deferred_tensor import DeferredTensor
label_desc: Use image node_id 5 for calling a global function with example usage: running_under_guitar() and returns: bool