code: def GetUnknownField(self, name):
      field_descriptor = self.descriptor.fields_by_name[name]
      wire_type = type_checkers.FIELD_TYPE_TO_WIRE_TYPE[
          field_descriptor.type
      ]
      field_tag = encoder.TagBytes(field_descriptor.number, wire_type)
      result_dict = {}
      for tag_bytes, value in self.empty_message._unknown_fields:
          if tag_bytes == field_tag:
              decoder = unittest_pb2.TestAllTypes._decoders_by_tag[
                  tag_bytes
              ][0]
              decoder(
                  value, 0, len(value), self.all_fields, result_dict
              )
      return result_dict[field_descriptor]
  
imports: from google.protobuf import unittest_mset_pb2
  from google.protobuf import unittest_pb2
  from google.protobuf import unittest_proto3_arena_pb2
  from google.protobuf.internal import api_implementation
  from google.protobuf.internal import encoder
  from google.protobuf.internal import message_set_extensions_pb2
  from google.protobuf.internal import missing_enum_values_pb2
  from google.protobuf.internal import test_util
  from google.protobuf.internal import testing_refleaks
  from google.protobuf.internal import type_checkers
label_desc: Use image node_id 2 for calling the UnknownFieldsAccessorsTest obj's underlying member method code with example usage: obj.GetUnknownField(name) and returns: result_dict