Element entity_autocomplete

entity_autocomplete =>

array:22 [
  "class" => "Drupal\Core\Entity\Element\EntityAutocomplete"
  "provider" => "core"
  "id" => "entity_autocomplete"
  "#input" => true
  "#size" => 60
  "#maxlength" => 128
  "#autocomplete_route_name" => false
  "#process" => array:5 [
    0 => array:2 [
      0 => "Drupal\Core\Entity\Element\EntityAutocomplete"
      1 => "processEntityAutocomplete"
    ]
    1 => array:2 [
      0 => "Drupal\Core\Entity\Element\EntityAutocomplete"
      1 => "processAutocomplete"
    ]
    2 => array:2 [
      0 => "Drupal\Core\Entity\Element\EntityAutocomplete"
      1 => "processAjaxForm"
    ]
    3 => array:2 [
      0 => "Drupal\Core\Entity\Element\EntityAutocomplete"
      1 => "processPattern"
    ]
    4 => array:2 [
      0 => "Drupal\Core\Entity\Element\EntityAutocomplete"
      1 => "processGroup"
    ]
  ]
  "#pre_render" => array:2 [
    0 => array:2 [
      0 => "Drupal\Core\Entity\Element\EntityAutocomplete"
      1 => "preRenderTextfield"
    ]
    1 => array:2 [
      0 => "Drupal\Core\Entity\Element\EntityAutocomplete"
      1 => "preRenderGroup"
    ]
  ]
  "#theme" => "input__textfield"
  "#theme_wrappers" => array:1 [
    0 => "form_element"
  ]
  "#target_type" => null
  "#selection_handler" => "default"
  "#selection_settings" => []
  "#tags" => false
  "#autocreate" => null
  "#validate_reference" => true
  "#process_default_value" => true
  "#element_validate" => array:1 [
    0 => array:2 [
      0 => "Drupal\Core\Entity\Element\EntityAutocomplete"
      1 => "validateEntityAutocomplete"
    ]
  ]
  "#value_callback" => array:2 [
    0 => "Drupal\Core\Entity\Element\EntityAutocomplete"
    1 => "valueCallback"
  ]
  "#type" => "entity_autocomplete"
  "#defaults_loaded" => true
]