Defines the interface for a Boot classes. Any CMS that wishes to work with Drush should extend BaseBoot. If the CMS has a Drupal-Compatibility layer, then it should extend DrupalBoot.
Implement this interface when building a Drush sql-sanitize plugin.
Storage for arguments preprocessed during preflight.
HandlerInterface represents a PHP system handler (e.g. the error reporting handler, the shutdown handler) that may be globally installed.
Inflection interface for the site alias manager.