code: def __init__(self, *metadata: tuple[str, t.Any]):
      self._metadata = tuple(metadata)
  
imports: from __future__ import annotations
  import functools
  import logging
  import typing
  from typing import TYPE_CHECKING
  import pytest
  from bentoml._internal.utils import LazyLoader
  from bentoml.grpc.interceptors.access import AccessLogServerInterceptor
  from bentoml.grpc.interceptors.opentelemetry import AsyncOpenTelemetryServerInterceptor
  from bentoml.grpc.utils import import_generated_stubs
  from bentoml.grpc.utils import import_grpc
  from bentoml.grpc.utils import wrap_rpc_handler
  from bentoml.testing.grpc import async_client_call
  from bentoml.testing.grpc import create_channel
  from bentoml.testing.grpc import create_test_bento_servicer
  from bentoml.testing.grpc import make_standalone_server
  from tests.proto import service_test_pb2
  from tests.proto import service_test_pb2_grpc
  from tests.unit.grpc.conftest import TestServiceServicer
label_desc: Use image node_id 1 to create a new AppendMetadataInterceptor object from inherited base classes: aio with example: obj = AppendMetadataInterceptor()