How to use the opentelemetry-sdk.src.opentelemetry.sdk.trace.__init__.Span.empty_links function in opentelemetry-sdk

self._lock = threading.Lock()

        if attributes is None:
            self.attributes = Span.empty_attributes
        else:
            self.attributes = BoundedDict.from_map(
                MAX_NUM_ATTRIBUTES, attributes
            )

        if events is None:
            self.events = Span.empty_events
        else:
            self.events = BoundedList.from_seq(MAX_NUM_EVENTS, events)

        if links is None:
            self.links = Span.empty_links
        else:
            self.links = BoundedList.from_seq(MAX_NUM_LINKS, links)

        self.end_time = None  # type: Optional[int]
        self.start_time = None  # type: Optional[int]
        self.instrumentation_info = instrumentation_info