https://docs.spring.io/spring-framework/docs/5.2.10.RELEASE/javadoc-api/org/springframework/messaging/support/MessageBuilder.html
MessageBuilder (Spring Framework 5.2.10.RELEASE API)
spring frameworkreleaseapi
https://pulsar.apache.org/api/cpp/4.0.x/classpulsar_1_1_message_builder.html
pulsar-client-cpp: pulsar::MessageBuilder Class Reference
pulsarclientcppclassreference