Method: Returns the currently registered loaders indexed by their corresponding vendor directories.

Method: Finds the path to the file where the class is defined.

Method: Loads the given class or interface.

Method: Unregisters this instance as an autoloader.

Method: Registers this instance as an autoloader.

Method: The APCu prefix in use, or null if APCu caching is not enabled.

Method: APCu prefix to use to cache found/not-found classes, if the extension is enabled.