public ConstraintManager::__construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler)
Overrides \Drupal\Component\Plugin\PluginManagerBase::__construct().
Parameters
\Traversable $namespaces: An object that implements \Traversable which contains the root paths keyed by the corresponding namespace to look for plugin implementations.
\Drupal\Core\Cache\CacheBackendInterface $cache_backend: Cache backend instance to use.
\Drupal\Core\Extensi