@Override
    public final void setNetworkWiring(ContentChannel channel, CompletionHandler completionHandler) {
        if (networkIsInitialized)
            throw new IllegalStateException("Network wiring already set and can only be set once.");

        this.channel = channel;
        this.completionHandler = completionHandler;
        networkIsInitialized = true;
    }
For internal use: Expose JDisc wiring to ensure asynchronous cleanup.

@param channel the channel to the client receiving the response
@param completionHandler the JDisc completion handler which will be invoked at the end
       of the rendering
@throws IllegalStateException if attempted invoked more than once
container-core/src/main/java/com/yahoo/processing/rendering/AsynchronousSectionedRenderer.java