code: def represent_none(self, data):
      return self.represent_scalar("tag:yaml.org,2002:null", "null")
  
imports: from .error import *
  from .nodes import *
  import datetime, copyreg, types, base64, collections
label_desc: Use image node_id 2 for calling the SafeRepresenter obj's underlying member method code with example usage: obj.represent_none(data) and returns: self