Information about options for all kinds of purposes will be held here. @code 'option_name' => array(
),
array Returns the options of this handler/plugin.
Overrides ArgumentPluginBase::defineOptions
protected function defineOptions() {
  $options = parent::defineOptions();
  if (!empty($this->definition['numeric'])) {
    $options['break_phrase'] = array(
      'default' => FALSE,
      'bool' => TRUE,
    );
  }
  $options['add_table'] = array(
    'default' => FALSE,
    'bool' => TRUE,
  );
  $options['require_value'] = array(
    'default' => FALSE,
    'bool' => TRUE,
  );
  if (isset($this->helper)) {
    $this->helper
      ->defineOptions($options);
  }
  else {
    $helper = new ManyToOneHelper($this);
    $helper
      ->defineOptions($options);
  }
  return $options;
}