Issue #3197135 by Shashwat Purav, ilgnerfagundes, le72:...

Issue #3197135 by Shashwat Purav, ilgnerfagundes, le72: hook_validation_constraint_alter() example code

core/core.api.php

@@ -2275,7 +2275,7 @@ function hook_config_schema_info_alter(&$definitions) {
  * @see \Drupal\Core\Validation\Annotation\Constraint
  */
 function hook_validation_constraint_alter(array &$definitions) {
-  $definitions['Null']['class'] = '\Drupal\mymodule\Validator\Constraints\MyClass';
+  $definitions['Null']['class'] = '\Drupal\mymodule\Plugin\Validation\Constraints\MyClass';
 }
 
 /**