@Override
    public final void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
        try (TaskCloseable ignore = PerfMark.traceTask("ORR.writeInternal")) {
            writeInternal(ctx, msg, promise);
        }
    }
Override to add custom modifications to the request before it goes out

@param headers
zuul-core/src/main/java/com/netflix/zuul/netty/server/OriginResponseReceiver.java