class_docstr: IdentityRegion is designed to implement a dummy region that returns the input
  as the output.
code: def initialize(self):
      pass
  
file_path: nupic-legacy/examples/network/custom_region/identity_region.py
imports: from nupic.bindings.regions.PyRegion import PyRegion
label_desc: Use image node_id 2 for calling the IdentityRegion obj's underlying member method code with example usage: obj.initialize() without return types