function TerrainProviderBuilder(options) {
  this.ellipsoid = options.ellipsoid ?? Ellipsoid.default;
  this.tilingScheme = undefined;
  this.heightmapWidth = undefined;
  this.heightmapHeight = undefined;
  this.levelZeroMaximumGeometricError = undefined;
  this.rectangles = [];
}
Used to track creation details while fetching initial metadata

@constructor
@private

@param {VRTheWorldTerrainProvider.ConstructorOptions} options An object describing initialization options