SameOrgApiDemo.java

/**
 * Class to demo new Url.getOrgDomainUrl() and UserInfo.getSessionId() methods
 */

public class SameOrgApiDemo{
  //This method will make a call to same org
  public static void getOrgLimits(){
  Http h = new Http();
  HttpRequest req = new HttpRequest();  
  req.setEndpoint(Url.getOrgDomainUrl().toExternalForm()
     + '/services/data/v44.0/limits');
  req.setMethod('GET');
  req.setHeader('Authorization', 'Bearer ' + UserInfo.getSessionId());
  HttpResponse res = h.send(req);
  }
}