code: protected function getUserOptions()
      {
          $options = array();
          if ($this->_options->getSort()) {
              $options[] = '-sort';
          }
          if ($this->_options->getIgnoreBeads()) {
              $options[] = '-ignoreBeads';
          }
          if ($this->_options->getForce()) {
              $options[] = '-force';
          }
          if ($this->_options->getStartPage() > 1) {
              $options[] = '-startPage ' . $this->_options->getStartPage();
          }
          if ($this->_options->getEndPage() < PHP_INT_MAX) {
              $options[] = '-endPage ' . $this->_options->getEndPage();
          }
          return join(' ', $options);
      }
docs: Return array of command line options based on $_options configuration object
  
  @return string[]