boolean maybeUnmute() {
        if (muteState == ChannelMuteState.MUTED) {
            if (!disconnected) transportLayer.addInterestOps(SelectionKey.OP_READ);
            muteState = ChannelMuteState.NOT_MUTED;
        }
        return muteState == ChannelMuteState.NOT_MUTED;
    }
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