In Spring Boot 2.0 (spring-session-core-2.0.2), how to replace the changed session-related class.

In spring-session-core-2.0.2, the following sources that existed in the previous version are
Alternate sources that are missing but will replace these sources,
Also, I don't know how to implement the replacement, so
I would appreciate your advice and guidance.

· org.springframework.session.web.http.HttpSessionStratey.java
· org.springframework.session.ExpiringSession.java

Thank you for your cooperation.

In spring-session-core-2.0.2, the following sources that exist in the previous version
Altough lost, alternative sources to replace these sources,
Since the replacement mounting method is unknown,
I would have been if you could give me advice and guidance.

·Org.springframework.session.web.http.HttpSessionStratey.java
· Org.springframework.session.ExpiringSession.java

Thank you.

[Additional note]

>Dear TAKUMA, Thank you for your reply.
I will check and refer to it, and I will add the results of the correspondence at a later date.

Also, the following was omitted from the question.
Let me add it.

· org.springframework.session.SessionRepository.java

The getSession method, which existed in the previous version, has disappeared as well.
I looked for an alternative source and method, but I was not sure. If you have any clues, could you please let me know?