[Java dapr SDK]io.dapr.client.domain.CloudEvent mismatch the defination

According to
https://docs.dapr.io/developing-applications/building-blocks/pubsub/pubsub-cloudevents/
v1.0 CloudEvent should contains parameter
[
traceparent
traceid
tracestate
topic
pubsubname
time].
But when we are using dapr-sdk 1.8.0, there is no
[
traceparent
traceid
tracestate
topic
pubsubname
time]
My question is why don't java SDK CloudEvent class don't have these items?

I'm asking because we need the topic dynamically to get some information from the topic....