SonataAdminBundle: "The option "field_options" does not exist" in Datagrid Mapper

It seems that configured option ‘field_option’ in configureDatagridFilters is no more recognized in [entityname]Admin class. Thi is my code

        $datagridMapper
            ->add('id')
            ->add('itemType', 'doctrine_orm_choice', array('label'          => 'Tipo item',
                                                            'field_options' => array(
                                                            'required'      => FALSE,
                                                            'choices'       => array("image"            => "Immagine",
                                                                                    "video-youtube" => "Video Youtube",
                                                                                    "text"          => "Testo")
                                                                                ),
                                                            'field_type'    => 'choice')
                                                            )

class DatagridMapper extends BaseMapper {

public function add($name, $type = null, array $filterOptions = array(), $fieldType = null, $fieldOptions = null)
{
    if (is_array($fieldOptions)) {
        $filterOptions['field_options'] = $fieldOptions;
    }