https://pekko.apache.org/japi/pekko/current/org/apache/pekko/io/ChannelRegistration.html
ChannelRegistration
https://docs.spring.io/spring-framework/docs/4.3.7.RELEASE/javadoc-api/org/springframework/messaging/simp/config/ChannelRegistration.html
ChannelRegistration (Spring Framework 4.3.7.RELEASE API)
spring frameworkreleaseapi