>
*/
private $registered = array();
/**
* An array of IDs for queued script modules.
*
* @since 6.9.0
* @var string[]
*/
private $queue = array();
/**
* Holds the script module identifiers that have been printed.
*
* @since 6.9.0
* @var string[]
*/
private $done = array();
/**
* Tracks whether the @wordpress/a11y script module is available.
*
* Some additional HTML is required on the page for the module to work. Track
* whether it's available to print at the appropriate time.
*
* @since 6.7.0
* @var bool
*/
private $a11y_available = false;
/**
* Holds a mapping of dependents (as IDs) for a given script ID.
* Used to optimize recursive dependency tree checks.
*
* @since 6.9.0
* @var array