   interface to build custom readers for the <code>kafka-console-producer</code> tool.
                        </li>
                        <li>The <code>kafka.tools.DefaultMessageFormatter</code> class was removed. Please use the <code>org.apache.kafka.tools.consumer.DefaultMessageFormatter</code> class instead.
                        </li>
                        <li>The <code>kafka.tools.LoggingMessageFormatter</code> class was removed. Please use the <code>org.apache.kafka.tools.consumer.LoggingMessag