https://access.redhat.com/webassets/avalon/d/red_hat_build_of_eclipse_vert.x/4.0.3/vertx_javadocs/io/vertx/kafka/client/consumer/OffsetAndMetadata.html
OffsetAndMetadata (Vertx Javadocs 4.0.3.GA API)
vertxjavadocsgaapi
https://kafka.apache.org/0100/javadoc/org/apache/kafka/clients/consumer/OffsetAndMetadata.html
OffsetAndMetadata (kafka 0.10.0.1 API)
kafkaapi