pages = Any["index.md",
            "Manual" => Any["manual/variants.md",
                            "manual/rewrite.md",
                            "manual/interface.md",
                            "manual/codegen.md",
                            "manual/caching.md",
                            "manual/recursive_utils.md",
                            ],
            "api.md",
            "developer_api.md",
            "upgrade.md"
            ]
