code: public static void init(Context context, boolean enable) {
          PersistentLog.init(context);
  
          // `adb shell setprop vrtop.logging.enable true`
          enable_logging = enable;
          android.util.Log.d(TAG, "enable_logging: " + enable_logging);
          rebuild(MODE.DEVELOPER);
  
          enableSubsystem(SUBSYSTEM.MAIN, true);
  //        enableSubsystem(SUBSYSTEM.INPUT, true);
  //        enableSubsystem(SUBSYSTEM.FOCUS, true);
  
  //        enableSubsystem(SUBSYSTEM.TRACING, true);
  //        enableSubsystem(SUBSYSTEM.LAYOUT, true);
  //        enableSubsystem(SUBSYSTEM.WIDGET, true);
  
      }
docs: Initialize the default logging system. {@link MODE#DEVELOPER} is used as a default one, and
  only {@link SUBSYSTEM#MAIN} category is activated. Other categories might produce a lot of
  log messages that might affect the performance.
  In release version for the best performance the logging system should be turned off or at
  least only the most important categories enabled.
  @param context
  @param enable true if the logging system is enabled, false - *All* logging is disabled