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

self.kind = kind
        self._set_status_on_exception = set_status_on_exception

        self.span_processor = span_processor
        self.status = None
        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

def add_lazy_event(self, event: trace_api.Event) -> None:
        with self._lock:
            if not self.is_recording_events():
                return
            has_ended = self.end_time is not None
            if not has_ended:
                if self.events is Span.empty_events:
                    self.events = BoundedList(MAX_NUM_EVENTS)
        if has_ended:
            logger.warning("Calling add_event() on an ended span.")
            return
        self.events.append(event)