    def init_client(
        self,
        handle_class: type[RunnerHandle] | None = None,
        *args: t.Any,
        **kwargs: t.Any,
    ):
        """
        Initialize client for a remote runner instance. To be used within API server instance.
        """
Initialize client for a remote runner instance. To be used within API server instance.
src/bentoml/_internal/runner/runner.py