code: @Deprecated
      public void warn(Object message, Object[] params, Throwable t) {
          doLog(Level.WARN, FQCN, message, params, t);
      }
docs: Issue a log message with parameters and a throwable with a level of WARN.
  
  @param message the message
  @param params the message parameters
  @param t the throwable
  @deprecated To log a message with parameters, using {@link #warnv(Throwable, String, Object...)} is recommended.