private Channel unlinkFromOrigin() {
        if (originResponseReceiver != null) {
            originResponseReceiver.unlinkFromClientRequest();
            originResponseReceiver = null;
        }

        if (concurrentReqCount.get() > 0) {
            origin.recordProxyRequestEnd();
            concurrentReqCount.decrementAndGet();
        }

        Channel origCh = null;
        if (originConn != null) {
            origCh = originConn.getChannel();
            originConn = null;
        }
        return origCh;
    }
Get the implementing origin.
<p>
Note: this method gets called in the constructor so if overloading it or any methods called within, you cannot
rely on your own constructor parameters.
zuul-core/src/main/java/com/netflix/zuul/filters/endpoint/ProxyEndpoint.java