code: @Override
      public void check() throws Exception {
          if (configFileEntry.refresh(configFile)) {
              log.debug("Compass config file changed, need compile.");
              buildInternal();
              return;
          }
  
          Result result = sassWatchable.check();
          if (!result.isEmpty()) {
              log.debug("File(s) changed:\n{}", result.toString());
              buildInternal();
          } else {
              log.debug("Nothing to compile - all css files are up to date");
          }
      }
docs: /* (non-Javadoc)
  @see org.opoo.press.Observer#check()