Сортировка msfilter2 по msOption

{$_modx->runSnippet('!mFilter2@PropertySet',[
        'class'=> 'msProduct',
        'element' => 'msProducts',
    'leftJoin' => json_encode([
    'flat_area' => [
    'class' => 'msProductOption',
    'on' => '`flat_area`.`key` = \'flat_area\' AND `flat_area`.`product_id` = `msProduct`.`id`'
    ]
    ]),
        'sortAliases' => '{"flat_area":"flat_area"}',
        'aliases' => 'msoption|flat_area==flat_area',
          'sort' => 'flat_area:asc',
        'returnIds'=> 1,
        'limit'=> 0,
        'filters'=> 'resource|parent:categories, msoption|rooms:room, ms|price:number, msoption|flat_area:number',
        'parents' => 2,
        'aliases' => 'msoption|rooms==rooms, ms|price==price, msoption|flat_area==flat_area',
        'tplOuter' => '@FILE chunks/msfilter2/search.outer.tpl',
        'tplFilter.outer.resource|parent' => '@FILE chunks/msfilter2/custom.select.tpl',
        'tplFilter.row.resource|parent'=>'@FILE chunks/msfilter2/custom.select.option.tpl',
        'tplFilter.outer.rooms' => '@FILE chunks/msfilter2/checkbox.outer.tpl',
        'tplFilter.row.rooms'=>'@FILE chunks/msfilter2/checkbox.tpl',
        'tplFilter.outer.price'=>'@FILE chunks/msfilter2/number.outer.tpl',
        'optionFilters'=>'{"flat_status:=":"Квартира свободна"}',

        'tplFilter.row.price'=>'@FILE chunks/msfilter2/number.tpl',
        'tplFilter.outer.flat_area'=>'@FILE chunks/msfilter2/number.outer.tpl',
        'tplFilter.row.flat_area'=>'@FILE chunks/msfilter2/number.tpl',
        'suggestions' => 0,
    ])}