aeron-client/src/main/java/io/aeron/command/DestinationMessageFlyweight.java
public DestinationMessageFlyweight channel(final String channel)
    {
        lengthOfChannel = buffer.putStringAscii(offset + CHANNEL_OFFSET, channel);

        return this;
    }
public DestinationMessageFlyweight channel(final String channel)
    {
        lengthOfChannel = buffer.putStringAscii(offset + CHANNEL_OFFSET, channel);

        return this;
    }
Set channel field in ASCII

@param channel field value
@return flyweight