             "xbsjTerrainProvider": {
                                "type": "XbsjCesiumTerrainProvider",
                                "XbsjCesiumTerrainProvider": {
                                    "url": "//lab.earthsdk.com/terrain/577fd5b0ac1f11e99dbd8fd044883638",
                                    "requestVertexNormals": true,
                                    "requestWaterMask": true
                                }
                            }
                        }
          