code: def add_multi_representer(cls, data_type, representer):
      if not "yaml_multi_representers" in cls.__dict__:
          cls.yaml_multi_representers = (
              cls.yaml_multi_representers.copy()
          )
      cls.yaml_multi_representers[data_type] = representer
  
imports: from .error import *
  from .nodes import *
  import datetime, copyreg, types, base64, collections
label_desc: Use image node_id 5 for calling the BaseRepresenter obj's underlying member method code with example usage: obj.add_multi_representer(cls, data_type, representer) without return types