new KafkaHeader() Vert.x Kafka producer record header. Source: vertx-kafka-client-js/kafka_header.js, line 32 Methods key() → {string} Source: vertx-kafka-client-js/kafka_header.js, line 47 Returns: the buffer key Type string value() → {Buffer} Source: vertx-kafka-client-js/kafka_header.js, line 66 Returns: the buffer value Type Buffer