code: def __init__(self, first_token, key_to_value, prev_names=None):
      assert first_token == "res2-block"
      XconfigLayerBase.__init__(
          self, first_token, key_to_value, prev_names
      )
  
imports: from __future__ import print_function
  from __future__ import division
  import math
  import re
  import sys
  from libs.nnet3.xconfig.basic_layers import XconfigLayerBase
label_desc: Use image node_id 1 to create a new XconfigRes2Block object from inherited base classes: XconfigLayerBase with example: obj = XconfigRes2Block(first_token, key_to_value, prev_names)