public Charset getCharset() {
		return charset;
	}
Base for RocketMQ header mappers.

@author caotc
@since 2.1.1.RELEASE
spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/support/AbstractRocketMQHeaderMapper.java