Trait Header 

pub trait Header {
    // Required methods
    fn key(&self) -> &str;
    fn value(&self) -> Option<&[u8]>;
}

A header is a key-value pair.

Corresponds to Java’s org.apache.kafka.common.header.Header.

Required Methods

fn key(&self) -> &str

Returns the key of the header.

The key must not be null (always returns a valid string reference).

fn value(&self) -> Option<&[u8]>

Returns the value of the header.

The value may be None (corresponding to Java’s null).

Implementors

impl Header for RecordHeader