Set default options
Overrides StylePluginBase::defineOptions
protected function defineOptions() {
$options = parent::defineOptions();
$options['columns'] = array(
'default' => '4',
);
$options['alignment'] = array(
'default' => 'horizontal',
);
$options['fill_single_line'] = array(
'default' => TRUE,
'bool' => TRUE,
);
$options['summary'] = array(
'default' => '',
);
return $options;
}