code: def ConvertToWireFormat(self, value):
      
      # Is it a protobuf-based value?
      if hasattr(value.__class__, "protobuf"):
        if value.__class__.protobuf:
          type_name = ("type.googleapis.com/%s" %
                       value.__class__.protobuf.__name__)
        else:
          type_name = value.__class__.__name__
        data = value.SerializeToString()
      # Is it a primitive value?
      elif hasattr(value.__class__, "data_store_type"):
        wrapper_cls = self.__class__.WRAPPER_BY_TYPE[
            value.__class__.data_store_type]
        wrapped_data = wrapper_cls()
        wrapped_data.value = value.SerializeToDataStore()
  
        type_name = ("type.googleapis.com/google.protobuf.%s" %
                     wrapper_cls.__name__)
        data = wrapped_data.SerializeToString()
      else:
        raise ValueError("Can't convert value %s to an protobuf.Any value." %
                         value)
  
      any_value = AnyValue(type_url=type_name, value=data)
      output = _SerializeEntries(_GetOrderedEntries(any_value.GetRawData()))
  
      return (self.encoded_tag, VarintEncode(len(output)), output)
docs: Encode the nested protobuf into wire format.