code: public static Map<String, Object> collect() {
          Map<String, Object> infos = new TreeMap<String, Object>();
  
          systemInfo(infos);
          memInfo(infos);
          threadInfo(infos);
          gcInfo(infos);
          runtimeInfo(infos);
  
          return infos;
      }
docs: Collects all available infos in one map.
  
  @return the map populated with the information.