Setting a custom header using BrowserMob-Proxy REST api

问题:

I have a browsermob proxy running on port 9091. I am trying to use browsermob-proxy REST API to set a custom header. When I make a request to my app using Selenium via the proxy, I don't see the header printed in my apps console. Below is my code. The request body is based on documentation here. My requirement is to use BrowserMob proxy API and not its Java library for this particular use case. Anything I am doing wrong in the code below?

 Proxy proxy = new java.net.Proxy(java.net.Proxy.Type.HTTP, new InetSocketAddress("localhost", 9091));   String bpmUrl = "http://localhost:8787/proxy/9091/interceptor/request";  Client client = Client.create();  String requestBody = "request.getMethod().addHeader(\"custom-header\", \"Bananabot/1.0\");";  WebResource resource = client.resource(bpmUrl);  resource.type(MediaType.TEXT_PLAIN_TYPE).post(requestBody);   String url = "http://localhost:8004";