public function register_routes() {
    register_rest_route(
      $this->namespace,
      '/' . $this->parent_base . '/(?P<id>[\d]+)/' . $this->rest_base,
      array(
        'args'   => array(
          'parent' => array(
            'description' => __( 'The ID for the parent of the autosave.' ),
            'type'        => 'integer',
          ),
        ),
        array(
          'methods'             => WP_REST_Server::READABLE,
          'callback'            => array( $this, 'get_items' ),
          'permission_callback' => array( $this, 'get_items_permissions_check' ),
          'args'                => $this->WP_REST_Autosaves_Controller::get_collection_params(),
        ),
        array(
          'methods'             => WP_REST_Server::CREATABLE,
          'callback'            => array( $this, 'create_item' ),
          'permission_callback' => array( $this, 'create_item_permissions_check' ),
          'args'                => $this->parent_controller->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
        ),
        'schema' => array( $this, 'get_public_item_schema' ),
      )
    );

    register_rest_route(
      $this->namespace,
      '/' . $this->parent_base . '/(?P<parent>[\d]+)/' . $this->rest_base . '/(?P<id>[\d]+)',
      array(
        'args'   => array(
          'parent' => array(
            'description' => __( 'The ID for the parent of the autosave.' ),
            'type'        => 'integer',
          ),
          'id'     => array(
            'description' => __( 'The ID for the autosave.' ),
            'type'        => 'integer',
          ),
        ),
        array(
          'methods'             => WP_REST_Server::READABLE,
          'callback'            => array( $this, 'get_item' ),
          'permission_callback' => array( $this->revisions_controller, 'get_item_permissions_check' ),
          'args'                => array(
            'context' => $this->get_context_param( array( 'default' => 'view' ) ),
          ),
        ),
        'schema' => array( $this, 'get_public_item_schema' ),
      )
    );
  }