Issue #3420990 by godotislate, smustgrave, alexpott, kim.pepper, longwave:...

# testing using \Symfony\Component\ErrorHandler\DebugClassLoader.

%The "Twig\\Environment::getTemplateClass\(\)" method is considered internal\. It may change without further notice\. You should not extend it from "Drupal\\Core\\Template\\TwigEnvironment"\.%

# Skip deprecations warning for overriding Symfony properties in validation

# constraints. See https://www.drupal.org/project/drupal/issues/3425150.

%The "Symfony\\Component\\Validator\\Constraints\\[^"]+::\$[^"]+" property is considered final. You should not override it in "[^"]+"%

# Drupal 11.

%Drupal\\Core\\Form\\FormBuilder::getForm\(\).* will require a new "mixed \.\.\. \$args" argument in the next major version of its interface%

%Drupal\\Core\\Form\\FormBuilder::submitForm\(\).* will require a new "mixed \.\.\. \$args" argument in the next major version of its interface%

 *   The array of validation constraint definitions, keyed by plugin ID.

 *

 * @see \Drupal\Core\Validation\ConstraintManager

 * @see \Drupal\Core\Validation\Annotation\Constraint

 * @see \Drupal\Core\Validation\Attribute\Constraint

 */

function hook_validation_constraint_alter(array &$definitions) {

  $definitions['Null']['class'] = '\Drupal\my_module\Plugin\Validation\Constraints\MyClass';

namespace Drupal\Core\Config\Plugin\Validation\Constraint;

use Symfony\Component\Validator\Constraint;

use Drupal\Core\StringTranslation\TranslatableMarkup;

use Drupal\Core\Validation\Attribute\Constraint;

use Symfony\Component\Validator\Constraint as SymfonyConstraint;

/**

 * Checks that the value is the name of an existing config object.

 *

 * @Constraint(

 *   id = "ConfigExists",

 *   label = @Translation("Config exists", context = "Validation")

 * )

 */

class ConfigExistsConstraint extends Constraint {

#[Constraint(

  id: 'ConfigExists',

  label: new TranslatableMarkup('Config exists', [], ['context' => 'Validation'])

)]

class ConfigExistsConstraint extends SymfonyConstraint {

  /**

   * The error message.

namespace Drupal\Core\Config\Plugin\Validation\Constraint;

use Symfony\Component\Validator\Constraint;

use Drupal\Core\StringTranslation\TranslatableMarkup;

use Drupal\Core\Validation\Attribute\Constraint;

use Symfony\Component\Validator\Constraint as SymfonyConstraint;

/**

 * Checks that config dependencies contain specific types of entities.

 *

 * @Constraint(

 *   id = "RequiredConfigDependencies",

 *   label = @Translation("Required config dependency types", context = "Validation")

 * )

 */

class RequiredConfigDependenciesConstraint extends Constraint {

#[Constraint(

  id: 'RequiredConfigDependencies',

  label: new TranslatableMarkup('Required config dependency types', [], ['context' => 'Validation'])

)]

class RequiredConfigDependenciesConstraint extends SymfonyConstraint {

  /**

   * The error message.

namespace Drupal\Core\Entity\Plugin\Validation\Constraint;

use Symfony\Component\Validator\Constraint;

use Drupal\Core\StringTranslation\TranslatableMarkup;

use Drupal\Core\Validation\Attribute\Constraint;

use Symfony\Component\Validator\Constraint as SymfonyConstraint;

/**

 * Checks if a value is a valid entity type.

 *

 * This differs from the `EntityBundleExists` constraint in that checks that the

 * validated value is an *entity* of a particular bundle.

 *

 * @Constraint(

 *   id = "Bundle",

 *   label = @Translation("Bundle", context = "Validation"),

 *   type = { "entity", "entity_reference" }

 * )

 */

class BundleConstraint extends Constraint {

#[Constraint(

  id: 'Bundle',

  label: new TranslatableMarkup('Bundle', [], ['context' => 'Validation']),

  type: ['entity', 'entity_reference']

)]

class BundleConstraint extends SymfonyConstraint {

  /**

   * The default violation message.