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

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

        return this;
    }
Set the channel field as ASCII

@param channel field value
@return flyweight