Please explain who below code will work? what is the use of "restTemplate.setRequestFactory(new MyBasicAuthentication())"

----------Below code written in my service impl class ------------

restTemplate.setRequestFactory(new MyBasicAuthentication());
                ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.POST, request, String.class,
                        urlVariables);

What is the use of below code..? When we shoul use this code Please explain step by step.

        public class MyBasicAuthentication extends SimpleClientHttpRequestFactory {

        private static class MyHostnameVerifier implements HostnameVerifier {
            @Override
            public boolean verify(String urlHostName, SSLSession session) {
                return true;
            }
        }

        @Override
        protected void prepareConnection(HttpURLConnection connection, String httpMethod) throws IOException {


            if (connection instanceof HttpsURLConnection) {
                ((HttpsURLConnection) connection).setHostnameVerifier(new MyHostnameVerifier());
            }
            super.prepareConnection(connection, httpMethod);
        }