code: def pixel_norm(x, epsilon=1e-8):
      with tf.variable_scope("PixelNorm"):
          epsilon = tf.constant(epsilon, dtype=x.dtype, name="epsilon")
          return x * tf.rsqrt(
              tf.reduce_mean(tf.square(x), axis=1, keepdims=True)
              + epsilon
          )
  
imports: import numpy
  import tensorflow
  import dnnlib
  import dnnlib.tflib
label_desc: Use image node_id 14 for calling a global function with example usage: pixel_norm(x, epsilon) and returns: unknown