@Override
	public Class<? extends BinderSpecificPropertiesProvider> getExtendedPropertiesEntryClass() {
		return RocketMQSpecificPropertiesProvider.class;
	}
rocketMQ specific extended binding properties class that extends from
{@link AbstractExtendedBindingProperties}.

@author <a href="mailto:fangjian0423@gmail.com">Jim</a>
spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/properties/RocketMQExtendedBindingProperties.java