public ConfigInstallerInterface::installCollectionDefaultConfig($collection)
Installs all default configuration in the specified collection.
The function is useful if the site needs to respond to an event that has just created another collection and we need to check all the installed extensions for any matching configuration. For example, if a language has just been created.
string $collection: The configuration collection.
public function installCollectionDefaultConfig($collection);
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Config!ConfigInstallerInterface.php/function/ConfigInstallerInterface::installCollectionDefaultConfig/8.1.x