http://nexus.sonatype.org/oss-repository-hosting.html/vertx-parent/vertx-ext/vertx-ext-parent/vertx-kafka-client: Sonatype helps open source projects to set up Maven repositories on https://oss.sonatype.org/ (Eclipse) 
public final class io.vertx.kafka.client.serialization.VertxSerdes$BufferSerde extends org.apache.kafka.common.serialization.Serdes$WrapperSerde<io.vertx.core.buffer.Buffer>
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: io.vertx.kafka.client.serialization.VertxSerdes$BufferSerde
  super_class: org.apache.kafka.common.serialization.Serdes$WrapperSerde
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // io.vertx.kafka.client.serialization.VertxSerdes$BufferSerde this
         0: .line 44
            aload 0 /* this */
            new io.vertx.kafka.client.serialization.BufferSerializer
            dup
            invokespecial io.vertx.kafka.client.serialization.BufferSerializer.<init>:()V
            new io.vertx.kafka.client.serialization.BufferDeserializer
            dup
            invokespecial io.vertx.kafka.client.serialization.BufferDeserializer.<init>:()V
            invokespecial org.apache.kafka.common.serialization.Serdes$WrapperSerde.<init>:(Lorg/apache/kafka/common/serialization/Serializer;Lorg/apache/kafka/common/serialization/Deserializer;)V
         1: .line 45
            return
        end local 0 // io.vertx.kafka.client.serialization.VertxSerdes$BufferSerde this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/vertx/kafka/client/serialization/VertxSerdes$BufferSerde;
}
Signature: Lorg/apache/kafka/common/serialization/Serdes$WrapperSerde<Lio/vertx/core/buffer/Buffer;>;
SourceFile: "VertxSerdes.java"
NestHost: io.vertx.kafka.client.serialization.VertxSerdes
InnerClasses:
  public final BufferSerde = io.vertx.kafka.client.serialization.VertxSerdes$BufferSerde of io.vertx.kafka.client.serialization.VertxSerdes
  public WrapperSerde = org.apache.kafka.common.serialization.Serdes$WrapperSerde of org.apache.kafka.common.serialization.Serdes