code: @Override
    public Logger getLogger(String name) {
      String tag = createTag(name);
      Logger logger = loggerMap.get(tag);
      if (logger == null) {
        Logger newInstance = new TimberLoggerAdapter(tag);
        Logger oldInstance = loggerMap.putIfAbsent(tag, newInstance);
        logger = oldInstance == null ? newInstance : oldInstance;
      }
      return logger;
    }
docs: Return an appropriate {@link TimberLoggerAdapter} instance by name.