code: public static String getVersionInfo() {
          String info = versionInfo.get();
          if (info == null) {
              info = String.format(
                  Locale.ENGLISH,
                  VERSION_INFO,
                  BuildConfig.VERSION_NAME,
                  getLibInfo(),
                  BuildConfig.BUILD_TIME,
                  BuildConfig.BUILD_HOST,
                  getSysInfo());
  
              versionInfo.compareAndSet(null, info);
          }
  
          return info;
      }
docs: This is information about this library build.