public ChannelMuteState muteState() {
        return muteState;
    }
Unmute the channel. The channel can be unmuted only if it is in the MUTED state. For other muted states
(MUTED_AND_*), this is a no-op.

@return Whether or not the channel is in the NOT_MUTED state after the call
clients/src/main/java/org/apache/kafka/common/network/KafkaChannel.java