code: def _get_body_instance(self):
          
          simple_body = {
              MultipartType.OFPMP_FLOW: FlowStatsRequest,
              MultipartType.OFPMP_AGGREGATE: AggregateStatsRequest,
              MultipartType.OFPMP_PORT_STATS: PortStatsRequest,
              MultipartType.OFPMP_QUEUE: QueueStatsRequest,
              MultipartType.OFPMP_GROUP: GroupStatsRequest,
              MultipartType.OFPMP_METER: MeterMultipartRequest,
              MultipartType.OFPMP_EXPERIMENTER: ExperimenterMultipartHeader
          }
  
          array_of_bodies = {MultipartType.OFPMP_TABLE_FEATURES: TableFeatures}
  
          if isinstance(self.multipart_type, UBInt16):
              self.multipart_type = self.multipart_type.enum_ref(
                  self.multipart_type.value)
  
          pyof_class = simple_body.get(self.multipart_type, None)
          if pyof_class:
              return pyof_class()
  
          array_of_class = array_of_bodies.get(self.multipart_type, None)
          if array_of_class:
              return FixedTypeList(pyof_class=array_of_class)
  
          return BinaryData(b'')
docs: Return the body instance.