final class Validation

Context.php in drupal/core/lib/Drupal/Component/Plugin/Context/Context.php

Contains \Drupal\Component\Plugin\Context\Context.

Context.php in drupal/core/lib/Drupal/Core/Plugin/Context/Context.php

Contains \Drupal\Core\Plugin\Context\Context.

ExecutablePluginBase.php in drupal/core/lib/Drupal/Core/Executable/ExecutablePluginBase.php

Contains \Drupal\Core\Executable\ExecutablePluginBase.

TypedDataManager.php in drupal/core/lib/Drupal/Core/TypedData/TypedDataManager.php

Contains \Drupal\Core\TypedData\TypedDataManager.

final class Validation {

  /**
   * Creates a new validator.
   *
   * If you want to configure the validator, use
   * {@link createValidatorBuilder()} instead.
   *
   * @return ValidatorInterface The new validator.
   */
  public static function createValidator() {
    return self::createValidatorBuilder()
      ->getValidator();
  }

  /**
   * Creates a configurable builder for validator objects.
   *
   * @return ValidatorBuilderInterface The new builder.
   */
  public static function createValidatorBuilder() {
    return new ValidatorBuilder();
  }

  /**
   * This class cannot be instantiated.
   */
  private function __construct() {
  }

}