/**
* adds a class to a tag if it's set in the field params
* @param string $tag
* @param sfAdminColumn $column
* @param $params
* @param $action
* @return string
*/
public function getClass( $tag, $column, $action )
{
$classParam = $this->getParameterValue($action.'.fields.'.$column->getName().'.class');
$class = $classParam ? ' class="' . $classParam . '" ' : '';
return "<$tag$class>";
}
