public DiscoverableInterface::findAll()
Returns an array of discoverable items.
array An array of discovered data keyed by provider.
\Drupal\Component\Discovery\DiscoveryException Exception thrown if there is a problem during discovery.
public function findAll();
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https://api.drupal.org/api/drupal/core!lib!Drupal!Component!Discovery!DiscoverableInterface.php/function/DiscoverableInterface::findAll/8.1.x