code: def BERTClassifierHead(n_classes):
      return tl.Serial(
          [
              tl.Select([0], n_in=2),
              tl.Dense(
                  n_classes,
                  kernel_initializer=tl.RandomNormalInitializer(0.02),
                  bias_initializer=tl.RandomNormalInitializer(1e-6),
              ),
          ]
      )
  
imports: import os
  import pathlib
  import urllib
  import zipfile
  import gin
  import jax
  import tensorflow
  from trax import fastmath
  from trax import layers
  from trax.fastmath import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: BERTClassifierHead(n_classes) and returns: tl