material-maps.json

                                        20.025724411010742,
                                        17.211849212646484,
                                        2.6730724584922427e-06
                                    ],
                                    "thickness": 2.660799980163574
                                }
                            ],
                            [
                                {
                                    "material": null,
                                    "thickness": 0.0
                                }
                            ],
                            [
                                {
                                    "material": null,
                                    "thickness": 0.0
                                }
                            ],
                            [
                                {
                                    "material": null,
                                    "thickness": 0.0
                                }
                            ],
                            [
                                {
                                    "material": null,
                                    "thickness": 0.0
                                }
                            ],
                            [
                                {
                                    "material": null,
                                    "thickness": 0.0
                                }
                            ]
                        ],
                        "mapMaterial": true,
                        "mappingType": "Default",
                        "type": "binned"
                    }
                },
                "volume": 32
            }
        ]
    },
    "Volumes": {
        "acts-geometry-hierarchy-map": {
            "format-version": 0,
            "value-identifier": "Material Volume Map"
        },
        "entries": []
    }
}