| Interface | Description | 
|---|---|
| Header | A  Headeris a key-value pair, and multiple headers can be included with the key, value, and timestamp in each Kafka message. | 
| Headers | A mutable ordered collection of  Headerobjects. | 
| Headers.HeaderTransform | A function to transform the supplied  Header. | 
| Class | Description | 
|---|---|
| ConnectHeaders | A basic  Headersimplementation. |