in kamelet-main/custom/src/main/java/org/apache/camel/example/custom/BeerProcessor.java [26:31]
public void process(Exchange exchange) throws Exception {
JsonNode jn = exchange.getMessage().getBody(JsonNode.class);
String n = jn.get("name").textValue();
String a = jn.get("alcohol").textValue();
exchange.getMessage().setBody(n + " (" + a + ")");
}