implementation.
	 * @param string               $hook_name  Hook name.
	 * @param mixed                $parameters Parameters, can be a string, an array or a multidimensional array.
	 */
	private function remove_subscriber_callback( Subscriber_Interface $subscriber, $hook_name, $parameters ) {
		if ( is_string( $parameters ) ) {
			$this->remove_callback( $hook_name, [ $subscriber, $parameters ] );
		} elseif ( is_array( $parameters ) && count( $parameters ) !== count( $parameters, COUNT_RECURSIVE ) ) {
			foreach ( $parameters as $parameter ) {
				$this->remove_subscriber_callback( $subscriber, $hook_name, $parameter );
			}
		} elseif ( is_array( $parameters ) && isset( $parameters[0] ) ) {
			$this->remove_callback( $hook_name, [ $subscriber, $parameters[0] ], isset( $parameters[1] ) ? $parameters[1] : 10 );
		}
	}
}