title: Get response header OkHttp
body: <p>I need to check response header of <code>HTTP request</code> using <code>OkHTTP</code> library. before loading data I need to check it's last update time. The problem in that that the response body is about <code>2 MB</code> so I need to get only <code>Last-Modified</code> header. Is it possible to load only response header without response body to increase the speed of the program`s RESTful actions? </p>