code: def fake_target_log_prob(x):
      return -0.5 * tf.reduce_sum(x**2)
  
imports: import tensorflow.compat.v2
  from tensorflow_probability.python.experimental.mcmc import kernel_builder
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 1 for calling a global function with example usage: fake_target_log_prob(x) and returns: unknown