Manages discovery of display variant plugins.
Hierarchy
class \Drupal\Component\Plugin\PluginManagerBase implements PluginManagerInterface uses DiscoveryTraitclass \Drupal\Core\Plugin\DefaultPluginManager implements CachedDiscoveryInterface, PluginManagerInterface, CacheableDependencyInterface uses DiscoveryCachedTrait, UseCacheBackendTraitclass \Drupal\Core\Display\VariantManager
See also
\Drupal\Core\Display\Annotation\DisplayVariant
\Drupal\Core\Display\VariantInterface
\Drupal\Core\Di