src/vs/editor/common/model/textModel.ts/ModelDecorationOverviewRulerOptions/constructor
class ModelDecorationOverviewRulerOptions:	constructor(options: model.IModelDecorationOverviewRulerOptions) {
		super(options);
		this._resolvedColor = null;
		this.position = (typeof options.position === 'number' ? options.position : model.OverviewRulerLane.Center);
	}