code: protected void logOut(O out) {
          String s = "";
          if (out != null) {
              s = outToString(out);
          }
          if (LOG.isTraceEnabled()) {
              LOG.trace("Process result: " + s);
          } else if (LOG.isDebugEnabled()) {
              if (s.length() > 4000)
                  s = s.substring(0, 4000) + "...";
              LOG.debug("Process result: " + s);
          }
      }
docs: Log output data
  
  @param out