docs: public static Properties loadProps(String filename) {
          Properties props = new Properties();
          FileInputStream fis = null;
          try {
              fis = new FileInputStream(filename);
              props.load(fis);
              return props;
          } catch (IOException ex) {
              throw new RuntimeException(ex);
          } finally {
              Closer.closeQuietly(fis);
          }
  
      }