anchor.diff:          exchange.getIn().setBody("test event");
   })
   .to("vertx-kafka:test_topic?bootstrapServers=kafka9092")
  -```
  +----
   Then later:
  -```
  +
  +[source,java]
  +----
   from("vertx-kafka:test_topic?bootstrapServers=kafka9092")
       .process(exchange -> {
           // get our kafka header
  
positive.code: Note: all headers propagated *from* kafka *to* camel exchange will contain `io.vertx.core.buffer.Buffer` value by default.
  
  Having the support of `io.vertx.core.buffer.Buffer` header type, will allow you un-wrap the header to any type without much knowledge in `byte[]`. For example:
  ```
  from("direct")
      .process(exchange -> {
          // set kafka header
  
negative.code:         System.out.println(headerBuffer.getDouble(0); // it will print 2.0
  })
  .to("direct)
  ----
  
  By default all headers are being filtered by `KafkaHeaderFilterStrategy`.
  Strategy filters out headers which start with `Camel` or `org.apache.camel` prefixes.
  