@todo Add method return type declaration.

Return value

?string Name of the default option.

See also

https://www.drupal.org/project/drupal/issues/3425150

File

core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/ValidKeysConstraint.php, line 75

Class

ValidKeysConstraint

Checks that all the keys of a mapping are valid and required keys present.

Namespace

Drupal\Core\Validation\Plugin\Validation\Constraint

Code

public function getDefaultOption() {
  return 'allowedKeys';
}

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