Wishlist_List::get_data()

	public function get_data() {
		$lists = $this->options[ self::WISHLISTS ];
		if ( ! is_array( $lists ) ) {
			$lists = [];
		}

		return [
			self::WISHLISTS => array_map( [ $this, 'render_list_row' ], $lists ),
			self::CREATE    => $this->create_list_form(),
		];
	}