code: def block_name(block_id):
      """Returns the scope name for the network block `block_id`."""
      return "progressive_gan_block_{}".format(block_id)
  
imports: import math
  from magenta.models.gansynth.lib import layers
  import tensorflow.compat.v1
  import tf_slim
label_desc: Use image node_id 1 for calling a global function with example usage: block_name(block_id) and returns: str