Element form

form =>

array:7 [
  "class" => "Drupal\Core\Render\Element\Form"
  "provider" => "core"
  "id" => "form"
  "#method" => "post"
  "#theme_wrappers" => array:1 [
    0 => "form"
  ]
  "#type" => "form"
  "#defaults_loaded" => true
]