КМП

 array:30 [
  "#type" => "select"
  "#options" => array:3 [
    "price_desc" => "По убыванию цены"
    "price_asc" => "По возрастанию цены"
    "name" => "По наименованию"
  ]
  "#title" => "Сортировать по"
  "#input" => true
  "#multiple" => false
  "#sort_options" => false
  "#sort_start" => 0
  "#process" => array:2 [
    0 => array:2 [
      0 => "Drupal\Core\Render\Element\Select"
      1 => "processSelect"
    ]
    1 => array:2 [
      0 => "Drupal\Core\Render\Element\Select"
      1 => "processAjaxForm"
    ]
  ]
  "#pre_render" => array:1 [
    0 => array:2 [
      0 => "Drupal\Core\Render\Element\Select"
      1 => "preRenderSelect"
    ]
  ]
  "#theme" => "select"
  "#theme_wrappers" => array:1 [
    0 => "form_element"
  ]
  "#value_callback" => array:2 [
    0 => "Drupal\Core\Render\Element\Select"
    1 => "valueCallback"
  ]
  "#defaults_loaded" => true
  "#tree" => false
  "#parents" => array:1 [
    0 => "sort_by"
  ]
  "#array_parents" => array:1 [
    0 => "sort_by"
  ]
  "#weight" => 0.004
  "#processed" => true
  "#required" => false
  "#attributes" => array:1 [
    "data-drupal-selector" => "edit-sort-by"
  ]
  "#title_display" => "before"
  "#description_display" => "after"
  "#errors" => null
  "#id" => "edit-sort-by"
  "#name" => "sort_by"
  "#value" => "price_desc"
  "#needs_validation" => true
  "#ajax_processed" => false
  "#sorted" => true
  "#validated" => true
]